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.

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

Example Input: Fact: decomposition increases the amount of nutrients in the soil
Example Output: Decomposition?

Example Input: Fact: metamorphosis is a stage in the life cycle process of some animals
Example Output:
Some animals change their appearance completely during a stage of the life cycle known as?