Question

how much of the light that reaches the earth from the sun is used for photosynthesis?
a 100%
b 5%
c 1%
d 50%

Explanation:

Photosynthesis is the process by which plants convert light energy into chemical energy. Only a small fraction of the solar energy reaching Earth is used for photosynthesis. Among the options, scientific data shows that approximately 1% of the light reaching Earth from the sun is utilized for photosynthesis. 100% is impossible as not all light is absorbed or used for photosynthesis. 5% and 50% are also higher than the actual proportion used.

Answer:

c. 1%