Question

How is oxygen added to the air?

A)Plants release oxygen as a waste product of photosynthesis.
B)Animals release oxygen as a waste product of respiration.
C)Oxygen is released from the burning of fossil fuels, such as coal.
D)Oxygen is released by plants as a waste produce of respiration.

Answer 1

Its A i just did this question

Step-by-step explanation:

Answer 2

The correct answer is A