An example of mitosis at work is a leaf turning yellow.
growing.
taking in carbon dioxide.
performing photosynthesis.

The right answer is Growing.

Mitosis is the cell division that allows an equal distribution of genetic information from an initial mother cell to two daughter cells while retaining the karyotype over the cell generations.

Mitosis will ensure - sometimes unfortunately - the good fulfillment of several phenomena:

1. embryonic development,

2. the general growth of organisms from birth to adult size,

3. the continued growth of certain organisms and / or organs; for example, trees, hair, teeth in ruminants, nails, ...

4. to renew dead cells; for example skin cells, red blood cells, ...

5. to ensure healing,

6. to preserve cellular identity during the development and renewal of cells belonging to the same organs, tissues, ...

7. As a result of disorders: cancers