Answer:
A. Respiration
Explanation:
The process in which oxygen atoms are made available to the cell of animals is called cell respiration. In cell respiration the food molecules undergo process which is called food oxidization, that make it available to be absorbed by the animal cell.
It's not always available , because its not windy everyday
I think the answer is <span>D) when evaluating a source for authority</span>
Answer:
What stages of aerobic respiration needs oxygen to happen?
The Krebs cycle and the electron transport system
