2. In what ways do normal stem cells contribute to maintaining homeostasis?'

Stem cells has a great contribution in order to maintaining homeostasis in the body because stem cells are produced rapidly and sent to the sites of the body where cells are old or get damaged maintain stability in the body.

Explanation:

Stem cells are specially type of cells which has the ability to change their structure according to the cell needed by the body. If brain cells are damaged, stem cells change their shape according to the brain cells and perform their functions by replacing the damage cells.