Which of these is returned to the atmosphere when plants transpire? O oxygen
O carbon
water
O nitrogen
Question 7

Oxygen

Explanation:

It's the cycle at which plants and animals breathe. Plants take on carbon dioxide from animals and breathe out oxygen which animals take in and breathe out carbon dioxide and so the cycle continues. N.B. By animals I also mean humans because we are higher animals but still under the classification of animals.

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.