Question

Why are leaves called as kitchen or food factory​

Answer 1

Because they prepare food for the plants , through the process of photosynthesis.

Answer 2

Leaves are the specialized structures for food production and hence, called food factories of the plants. Leaves are flat green structures which have a large surface area. The large surface area of leaves also provides a larger area for stomata to be spread all over the leaf. The amount of sunlight falling on the leaf is an important factor for many physiological processes of the plant, these include transpiration, photosynthesis, and respiration.