Question

_______________is the most important gas for the survival of living organisms.
a. Helium b. carbon-di-oxide
c. oxygen d. methane

Answer 1

heya....

your answer is:

c. Oxygen is the most important gas for the survival of living organisms.

It may help you ...☺☺

Answer 2

Answer:

Option C.

Explanation:

Oxygen, is the right answer.

Oxygen is the most important gas for the survival of human beings on earth. It is required to burn the fuel (fatty acids and sugar) in our cells in order to produce energy. we breathe oxygen to let it reach to our lungs, where the red blood cells transport the oxygen to the entire human body for the production of energy. Carbon dioxide is the gas that is released during this process of oxidisation.