Question

why photosynthesis is considered as a base energy source for most of living world

Answer 1

HEY mate here is your answer.
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Photosynthesis is considered as the base of energy source because it plays a role of producer that produce receive energies from different sources like from sun,etc.. to make food for itself and the excess is kept as fruits which are being consumed by other living organisms..

That is why it is called so.
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Hope it helps you.

^_^

Answer 2

Photosynthesis is a process of making food for plants with the help of water , sunlight, carbon dioxide and chlorophyll. This process takes place in leaves of the plants. The food prepared by the leaves gives the energy, minerals, etc. That's why photosynthesis is known as the base energy of the plants.