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.

[Q]: Fact: a phase change is when matter changes from one state into another state
[A]: All the water vanishes from a small depression basked in sunlight on a paved road because of?


[Q]: Fact: natural events usually cause changes to Earth 's surface
[A]: Tsunamis?


[Q]: Fact: omnivores eat plants
[A]:
Which creature would be safest from predators in its natural underground habitat?