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.

Fact: decomposition is when a decomposer breaks down dead organisms
Flowers start die when?

Fact: A bird is a pollinating animal
Which is likely to spread seed?

Fact: magnetism can cause objects to repel each other

What can cause objects to repel each other?