Q: What is made by trees and other plants during photosynthesis?   Read this paragraph and choose the correct option from the provided answers:  Oxygen is made by trees and other plants during photosynthesis. We know that we need oxygen to live. But why? This oxygen is an essential component for the optimal production of usable energy - which occurs through cellular respiration.   Choices:  - methane  - carbon dioxide  - nitrogen  - oxygen   A:
A:
oxygen