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.

dna is made up of six smaller molecules -- a five carbon sugar called deoxyribose, a phosphate molecule and four different nitrogenous bases (adenine, thymine, cytosine and guanine).

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link: