Question

Why do you think living things need oxygen?

Answer 1

Answer:

because it helps them live reproduce and grow thats all I really know if its not what you want sorry.

Answer 2

Because, most living things need oxygen to survive. Oxygen helps organisms grow, reproduce, and turn food into energy. Humans get the oxygen they need by breathing through their nose and mouth into their lungs. Oxygen gives our cells the ability to break down food in order to get the energy we need to survive.