Why is light energy required during photosynthesis

Explanation:

the process of photosynthesis occurs when green plants use the energy of light tobconvert carbon dioxide (co2) and waterb(h2o) into carbohydrate. Light energy is absorbed by chlorophyll, a photosynthetic pigment of the plant, while air containing carbon dioxide and oxygen enters the plant through the leaf stomata

Brainliest plz

Explanation:

1- 20%

2-20%

3-16%

4-13%

5- No it doesnt help considering that on the graph the percentages of when and how much they decreased is about the some compared to each other.