Answer: Option B. -> Climbers
:
B
$\bullet$ Plants with weak stems that take support on neighboring structures and climb up over them are called as climbers. Example: Grape vine.
$\bullet$ Creepers, like climbers, have a weak stem too but they usually spread on the ground. Example: Pumpkin.

Answer: Option D. -> Petiole
:
D
$\bullet$ The petiole is the stalk that connects leaf to the stem.
$\bullet$ Lamina is the broad part of the leaf with venation.
$\bullet$ The central vein in lamina is called the midrib.

Answer: Option D. -> midrib
:
D
Midrib is the thickest vein present in the middle of the leaf. It separates the lamina into two parts in a dicot leaf. Smaller veins are observed radiating out from the midrib.

Answer: Option A. -> fibrous root
:
A

Fibrous root systems consist of many fine hairlike roots that form a thick mat below the surface. Examples of plants that contain them are grasses, wheat, rice, marigold, maize, banana, millet, bamboo and onions.

Answer: Option D. -> ovule
:
D

Pistil is the innermost part of the flower. It is also the female reproductive part. Stigma, style and ovary are the parts of a pistil. The ovary contains ovule. Ovule contains the female gametes or the egg cells.

Answer: Option C. -> lamina
:
C
  $\bullet$ Lamina is the broad part of the leaf. It has veins and veinlets arranged either in a parallel manner or reticulate manner.
  $\bullet$ Important processes like photosynthesis, respiration occur here.

Answer: Option A. -> starch  
:
A

Plants prepare food by a process called photosynthesis. The food synthesised is a carbohydrate called glucose. It is transported to other parts of the plant as starch for storage and utilization.

Answer: Option A. -> roots
:
A
Sprouting is basically a process where seeds and legumes are germinated and eventually eaten raw. When seeds are soaked in water for a certain period of time, they germinate, causing their outer layers to tear open and allowing a young root to come out. Gram seeds absorb water and roots come out of them.

Answer: Option A. -> herb  
:
A

  $\bullet$ Plants with green and tender stems are called herbs. They are usually short and they do not have many branches. 
  $\bullet$ Some plants develop branches near the base of stem. The stem is hard but not very thick. Such plants are called shrubs.
  $\bullet$ Some plants are very tall and have hard and thick stem. The stems have branches in the upper part, much above the ground. Such plants are called trees.
  $\bullet$ Climbers have weak stem and they take support and climb up.

Answer: Option C. -> trees
:
C
  $\bullet$ Trees are tall plants with hard and thick brown stem. The stems have branches much above the ground. Eg: Mango tree.
  $\bullet$ Shrubs are plants with branches near the base of stem. The stem is hard but not very thick. Eg: Rose plant.
  $\bullet$ Plants with green and tender stems are called herbs. They are usually short and may not have many branches. Eg: Tomato.
  $\bullet$ Climbers have very weak stem. They take support and climb up other structures. Eg: Money plant.