TOEFL Reading

❓ Question What is the main idea of the passage?

A. A. Photosynthesis is inherently inefficient due to a flaw in the light-harvesting reactions.
B. B. The inefficiency of photosynthesis is an adaptive mechanism that protects plants from variable light damage.
C. C. Plants without PsbS protein grow faster in all light conditions because they capture more energy.
D. D. The primary goal of photosynthesis is to maximize solar energy capture for plant growth.

B. The inefficiency of photosynthesis is an adaptive mechanism that protects plants from variable light damage.