Given a statement, generate a question such that the answer is contained in that statement.

[EX Q]: Synapsids were a further evolution in a chain of mammalian animals
[EX A]: What was a further evolution in a chain of mammalian animals?

[EX Q]: genitalia are used in producing offspring
[EX A]: What are used in producing offspring?

[EX Q]: The volume of a thing depends on the mass of the object.
[EX A]:
What depends on the volume of a thing?