Question

how can we say that photosynthesis is the basic energy source for the living world

Answer 1

bcoz by this process plant get food n energy and also release oxygen in air during photosynthesise

Answer 2

Yes, because we, humans, depends on plants and animals for our food. animals depend on plants and other animals for their food. Because plant is the only producer in the world which can produce its own food through photosynthesis. so photosynthesis is the basic energy source for the living world.

Hope it helps you...