Question

What are the plants that are well known as food factories

Answer 1

Plants produce/manufacture (hence, factories) their own food from carbon dioxide and water in the presence of sunlight and chlorophyll, a green pigment which absorbs light energy; is concentrated in the chloroplasts found in green stems, sepals and leaves to yield sugar (food) and oxygen.
hope it helps you a lot

Answer 2

Leafof the plant is known as food factory bcoz this is where the food is being made and transported to all other regions of the plant