Which process does the grass used to make the food this horse needs? A.) Photosynthesis
B.) Respiration
C.) Eating
D.) Digestion

Photosynthesis

Explanation:

Just like trees and other plants, grass converts energy from sunlight into sugar through the process of photosynthesis. This energy is used to convert water and carbon dioxide into glucose. Carbon dioxide is absorbed through the stomata in the leaf and water is mainly derived from uptake in the roots. Photosynthesis makes the grass green and healthy.

I think option C is correct answer because we drawn bars on histogram by touching each other or not ,it makes no difference