Question

what is photosynthesis?
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Answer 1

Answer:

The process by which plants make their own food is called photosynthesis

hopefully

Answer 2

Photosynthesis is the process by which green plants take in carbon dioxide and water, in the presence of chlorophyll by using sunlight to make their own food, is called as photosynthesis.

Oxygen is released as a by product.

The formula for photosynthetic reaction is :-

$\sf 12H_2O + 6CO_2 \underset{chlorophyll}{\xrightarrow{Sunlight}} C_6H_{12}O_6 + 6H_2O + 6O_2 \uparrow$