Answer: Option B. -> oesophagus
:
B
The process of taking in food is called ingestion. After ingestion, the food is chewed and broken down in the mouth. This food then passes through a hollow muscular tube-like structure called the oesophagus. Oesophagus shows rhythmic contraction and relaxation called peristalsis which helps to push the food (bolus) in forward direction towards the stomach.

Answer: Option A. -> Liver 
:
A
Liver is the largest gland in our body. It is located inthe upper-rightportion of the abdominal cavity.​

Answer: Option B. -> Stomach
:
B
$\bullet$ Stomach receives food from the food pipe. It is an important organ of the digestive tract. The major part of the digestion occurs here.
$\bullet$ The liver is an organ shaped like a half-moon and is our body's largest solid organ. It is tilted in the body's cavity, with the left portion above the stomach.
$\bullet$ The small intestine (small bowel) is about 20 feet long and about an inch in diameter. It's job is to absorb most of the nutrients from the food we eat and drink.
$\bullet$In human and most animals, the mouth is the first portion of the alimentary canal that receives food and produces saliva.

Answer: Option B. -> ruminants
:
B
Ruminants are mammals that are able to acquire nutrients from plant-based food by fermenting it in a specialized stomach prior to digestion, principally through microbial actions. For example, cows and buffaloes. These animals have four bags to digest the food instead of one and they chew their food several times before sending it to the intestine.

Answer: Option B. -> tongue
:
B
Tongue isa fleshy muscular organ in the mouth of a mammal. It helps in ingestion, chewing, and swallowing of food. It also helps in mixing of food with saliva, speech, etc. It contains taste buds which have receptors which helps in sensing the taste of the food being ingested. The taste buds in different parts of the tongue respond to sweet, sour, bitter, salty or umami taste.

Answer: Option B. -> villi
:
B
Villi arehair-like structures present on the surface of the small intestine. Theyincrease thesurface area for absorption of nutrients.90% of the digestion and absorption of food occurs in the small intestine andthe rest takes place in the stomach and largeintestine.

Answer: Option C. -> teeth
:
C
Teeth present in our mouth helpin breaking of the food we intake into small piecesso that it can be absorbed and digested easily by our digestive system.

Answer: Option B. -> Food vacuole
:
B
A food vacuole is basically a storage unit of food in amoeba. It is formed only when amoeba has engulfed its prey completely following which digestive enzymes are released into the vacuole. The food vacuole digests the food. Wastes and excess water are transported outside the cell by contractile vacuoles.

Answer: Option A. -> cellulose
:
A
The cell wall of a plantis made up of cellulose. Cellulose is a long chain of linked sugar molecules.

Answer: Option C. -> Pseudopodia
:
C
Pseudopodia (Latin for "false feet") areresponsible for movement and capture of food in amoeba. They are actually projections of the cell membrane used for locomotion and taking in nutrients.