Answer: Option A. ->
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The main nutrients that we get from our food are carbohydrates, proteins, fats, vitamins and minerals.

Answer: Option A. ->
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Types of  carbohydrates + source: 1 Mark each
The three types of carbohydrates are sugar, starch and cellulose.
1. Sugar is a very sweet substance. It is naturally found in fruits.
2. Starch is present in grains like rice, wheat, maize and in tubers like potatoes.
3. Cellulose is found in foods like broccoli, cabbage and cauliflower.

Answer: Option A. ->
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 1 Mark each
Iodine helps the body by enabling 
1. Proper functioning of thyroid gland 
2. Normal body growth.

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Vitamin C helps in the growth and repair of tissues in all parts of our body. It also helps the body to fight against many diseases.

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Definition: 1 Mark
Example: 1 Mark
Fat is one of the three main macronutrients like proteins and carbohydrates. 
Fats produce more energy than carbohydrates do. It is an important form of energy storage for future use.
Some examples of fatty foods are milk, cheese, butter, cream, ghee, vegetable oils, meat, and fish liver oil.

Answer: Option A. ->
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Function of water: 1 Mark each
Any three:

1. Water helps the body to absorb nutrients from food.
2. It helps the body to get rid of toxic wastes through urine and sweat.
3. It helps to maintain constant body temperature.
5. It provides the medium for transportation of substances in the body.

Answer: Option A. ->
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Functions: 1 Mark each
Food Item: 1 Mark
Potassium helps the body with
1. Formation of new cells.
2. Transportation of nerve impulses in the body.
Foods rich in potassium: Bananas, avocados and fish.

Answer: Option A. ->
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Source of vitamin: 1 Mark each

$\begin{array}{cc}\text{Vitamin}& \text{Source}\\ \text{Vitamin A}& \text{Carrots}\\ \text{Vitamin B1}& \text{Beans}\\ \text{Vitamin C}& \text{Oranges}\\ \text{Vitamin D}& \text{Milk}\\ \text{Vitamin K}& \text{Fish Oil}\end{array}$

Answer: Option A. ->
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1 Mark each
The following steps are performed to test the presence of fat in a food item.

1. A small quantity of the food item to be tested is taken.
2. The food item is wrapped in a small piece of paper, and the paper is crushed.
3. The paper is straightened
4. The paper is then dried in sunlight for a while
5. An oily patch on the paper indicates the presence of fat in the tested food item.

Answer: Option A. ->
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1 Mark each
Any five:
 
The components present in our food are:- carbohydrates, fats, proteins, vitamins, minerals, water and fiber.
1. Carbohydrates are made of carbon, hydrogen and oxygen molecules. Sugars, starch and cellulose are examples of carbohydrates. Starch and cellulose are broken down in the body into simple sugars like glucose. They provide instant energy. Carbohydrates are present in rice, wheat, jowar, maize and other grains. They are also present in tubers and fruits.

2. Proteins are formed by carbon, hydrogen, oxygen and nitrogen. Nitrogen is the most essential element in proteins, but some proteins contain sulphur and phosphorus also. They form simple molecules called amino acids on digestion. Proteins act as building blocks and serve as materials helping in growth and repair of the body cells and tissues. They also help in the formation of hair and nails. Foods rich in proteins include lean meat, fish, eggs, milk, cheese, nuts, beans and peas.
3. Fats are also made up of carbon, hydrogen and oxygen. They have very little oxygen content and produce more energy than carbohydrates do. Fat below the skin protects the body against rapid loss of heat. It serves as a solvent for fat-soluble vitamins. It is an important form of energy storage for future use. Common food rich in fats includes milk, cheese, butter, cream, ghee, vegetable oils, meat and fish liver oils.
4. Vitamins are the chemical substances that help in maintaining a healthy body. Vitamins A, D, E, and K are fat soluble and can be stored in the body. Vitamin B complexes and Vitamin C are water soluble forms. They cannot be stored for a long period of time in the body. 
5. Minerals are needed in the diet in small quantities. These are obtained from table salt, green vegetables, and fruits.
6. Water is an important component which helps the body absorb the nutrients from the food. It also helps the body to get rid of toxic wastes through urine and sweat. It provides the medium for transportation of substances in the body.
7. Dietary fibres are necessary for the smooth movement of food in the alimentary canal. They provide bulk roughage to remove the undigested waste during defecation.