Through which process are oxygen atoms made available to the cells of
animals?
A. Respiration
B. Diffusion
C. Evaporation
D. Percolation

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.

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