fact and question: the mantle is a layer of the Earth
Question: The mantle is

What's the answer?

answer: solid bulk

fact and question: producer is a kind of role in an ecosystem
Question: Within an ecosystem, producers are likely to be

What's the answer?

answer: budding

fact and question: some humans live in houses
Question: A person going home would head

What's the answer?

answer: to a duplex

fact and question: An example of collecting data is measuring
Question: A thing which is measured, such as a bucket of salt, needs to first be

What's the answer?

answer:
gathered