Question

Which product of photosynthesis is mainly considered to be waste for plants, although some is used during respiration?

A. oxygen
B. carbon dioxide
C. glucose
D. energy

Answer 1

A. Oxygen

Step-by-step explanation:

A is the only one that makes sense because plants take in carbon dioxide, use glucose for food, and use energy to photosynthesize, and the only answer they don't use is A (oxygen) because they only produce it but not use it