"Vegetation is green because chlorophyll is green" is a borderline useless answer that intentionally misses the point of the question. Assuming the asker knows

"Vegetation is green because chlorophyll is green" is a borderline useless answer that intentionally misses the point of the question. Assuming the asker knows what chlorophyll is, all this does is shift the need for explanation one link up the chain. Try to empathize with someone asking this type of question. Would you be satisfied with the type of answer you support? Would it trigger immediate follow-up questions that are basic rephrasings of your original question?