Question

1. what would happen if plants stopped performing photosynthesis?

Explanation:

Photosynthesis is crucial for plants to produce food (glucose) and release oxygen. Without it, plants would not be able to make their own food and would start to die. Also, the oxygen supply in the atmosphere, which is vital for most life - forms including humans, would stop replenishing, leading to oxygen depletion over time.

Answer:

Plants would die as they can't produce food, and the oxygen in the atmosphere would stop being replenished, leading to oxygen depletion for other organisms.