What is edible

Food is the edible substance which are consumed by humans and other animals to absorb energy for various activities like physical movement, growth and development.
Edible parts of the plant
Almost all parts of the plants such as leaves, stems, roots, fruits, and seeds are considered to be edible parts.
a) Roots: We eat plant roots in the form of carrot, turnip, radish and beetroot.
b) Stem: We eat stems of some plants as in sugarcane, coriander. One form of stem tuber is potato. We also eat underground stem in the form of ginger.
c) Leaves: Many green leaves are the sources of calcium. Some leaves that we eat are spinach, cabbage, amaranthus, curry leaves etc. Onion is also a form leaf which is underground.
d) Flowers: Flowers of pumpkin, cauliflower are edible flowers. Some types of roses are also edible.
e) Fruits: We get edible fruits from many plants. Fruits can be fleshy fruits or dry fruits. e.g. mango, guava, orange, apple, pear, grapes, banana etc. Almonds, cashew nut are used as nuts.
f) Seeds: Seeds which are edible can be used as grains, pulses and oil seeds.