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: sedimentary rocks are formed from sediment compacting together
At the beach you are likely to find this type of stone:?

Fact: the phases of the Moon change the appearance of the Moon
the phases of the moon change the appearance of what?

Fact: animal cells can not perform photosynthesis

Which is able to create its own nourishment from sunlight?