Two patterns of reversible cell injury can be seen: cellular swelling and fatty change. cellular swelling is usually the result of:

Early sign of cell injury.

Explanation:

The injury might occur due to any accident or due to the presence of the harmful pathogen that might affect the body of an individual. Different mechanism are present in the body that helps in the natural healing process of the injury.

The cell injury might cause the fatty change and the cell swelling. The cell swelling after the injury illustrates and shows the signs of the cell injury. This is included in the early sign of the cell injury. Fatty change at the injury site indicates the later signs in the cell injury.

Thus, the answer is early Sign of cell injury.

d. planting trees

the trees take in carbon to make oxygen.