In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

[Q]: Question: Saturn is made mostly of helium and what else? Answer: hydrogen
[A]: Saturn is made mostly of helium and hydrogen.


[Q]: Question: Where does the stratosphere get most of its heat? Answer: sun
[A]: Sun does the stratosphere get most of its heat.


[Q]: Question: What's the process responsible for the presence of oxygen in our atmosphere? Answer: photosynthesis
[A]:
The process responsible for the presence of oxygen in our atmosphere is photosynthesis.