Sunlight is required for all cellular organisms on earth, because all organisms are either photosynthetic or dependent on a photosynthetic organism.
a. true
b. false

True

Explanation:

The sunlight is required for the living organism because all the living organism on the earth are either autotrophs or depends on the autotropic organism for their survival.

The green plants perform the process of photosynthesis by trapping sunlight. The other organism depends on the plants for their survival.

Hence, the given statement is true that all the living organism depends directly or indirectly on the sunlight.

answer; the above statement is (true);

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.