Which of these conditions is considered necessary for a

sidered necessary for a planet to support life?

A. the presence of carbon dioxide

B. high temperatures

C. the presence of free oxygen

D. the presence of liquid water

All

Explanation:

You would need carbon dioxide to be able to sustain life forms such as plants, warm enough temperatures to allow the development of animals, (because they cannot be frozen), they would, of course, need oxygen to allow anyone to breathe, and finally liquid water to sustain healthy life, because we must hydrate that is necessary for survival.