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: plants are a source of oxygen through photosynthesis
[EX A]: Chloroplasts in shrubs scrub carbon from the air and return?

[EX Q]: Fact: absorbing sunlight causes objects to heat
[EX A]: Which object would be best at heating up in the sunlight?

[EX Q]: Fact: the Earth revolving around the Sun causes the seasons to change on its axis
[EX A]:
If a season switches from one to another in a place, the earth has?