Answer: b) plants perform cellular respiration to generate usable chemical energy in the form of ATP
Step-by-step explanation:
plants carry photosynthesis to convert carbohydrates from co2 (hence a is incorrect)
plants use glucose (made by photosynthesis) to make ATP during respiration (therefore b is correct)
plants perform photosynthesis to produce carbohydrates, ATP is made afterwards, during respiration (hence c is incorrect)