This would be disease prevention
Single-celled organisms exchange gases directly across their cell membrane. However, the slow diffusion rate of oxygen relative to carbon dioxide limits the size of single-celled organisms. Simple animals that lack specialized exchange surfaces have flattened, tubular, or thin shaped body plans, which are the most efficient for gas exchange. However, these simple animals are rather small in size.
Carbohydrates are sugars, and they provide energy for all cells. They also provide structure.
Answer:
In both animal and plant cells. ... Only in plant cells. Mitochondria. Produces a usable form of energy for the cell.
Because other animals maybe needed that animal for food and now they are gone, and because the wolf helped the environment