I'm not completely sure but if I did know I would definitely tell u
Your answer would be respiration. This would be your answer because, plants take in carbon dioxide, and animals, including humans, breath oxygen. I hope this had helped you out.
Answer:
the answer should be A. the sum of all forces acting on an object
Explanation:
Here is your answer
B. NaCl
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In option A. Na isn't present.
In option C. there are two atoms of Na
So, option B is correct
HOPE IT IS USEFUL
