Given a fact, create a question that can be answered using the fact. Construct the question such that it is unambiguous, has a unique answer and the answer can be given using the fact.

[EX Q]: Fact: In the photosynthesis process oxygen has the role of waste product
[EX A]: Unlike CO2, oxygen is a waste product of?

[EX Q]: Fact: living things can all reproduce
[EX A]: Reproduction means a development of genes like?

[EX Q]: Fact: An example of protecting the environment is reducing the amount of waste
[EX A]:
What is an example of protecting the environment?