skin cells are lost daily even without injury. the cell cycle responds by promoting\nreproduction.\nrepair.\n…

Brief Explanations:

Skin cells are constantly lost. The cell - cycle promotes reproduction to replace these lost cells. Repair is for damaged cells, synthesis is part of the cell - cycle processes but not the main response here, and growth is more related to an increase in cell size or mass in a different context.

Answer:

reproduction.