Cells undergo mitosis to replace old damaged cells and to grow
Explanation:
replace old damaged cells- if you get a cut or scratch you cells undergo mitosis to repair the damaged skin.
to grow- as your body grows, from a kid to adult, your cells are in mitosis at all times. as you complete the growth stage, the cells still work to help grow your hair and nails, and etc.
I think C) availability of water is your best answer because alot of organisms count on water as a major resource because they need it to survive so a lack or a gain in the amount of water will majorly effect an ecosystem.
