Which molecule is the largest role in plant phototropism

a.) proteins
b.) auxins
c.) starches
d.) chlorophyll

The correct answer for this question is this one: "D.) chlorophyll"Phototropism by definition is the orientation of a plant or other organism in response to light. It can either be toward the source of light ( positive phototropism ) or away from it ( negative phototropism ).Hope this helps answer your question and have a nice day ahead.