Question

how plants are ultimate source of food on the earth

Answer 1

Plants are ultimate sources of food on the earth , plants are autograph , they can prepare there own food by the process of photosynthesis , . the result, formation of the food , that helps in other process in the formation of edible things , hence it contains energy , that satisfied living organisms .

Answer 2

Only plants can use the sun's energy to produce chemical energy in the form of glucose, which is then eaten by other animals.