The third one and the last one.
I believe the correct response is D. A single variable.
Answer:
A should be your answer. I know this was yesterday, but if this was it, let me know
Explanation:
Respiration is the reverse of Photosynthesis.
The ozonosphere is another term for the ozone layer, which is within the Earth's stratosphere. The ozone layer is responsible for absorbing most of the sun's ultraviolet (UV) radiation, thanks to its high concentration of ozone that is exclusive to this layer.