instruction:
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.
question:
Fact: melting is when solids are heated above their melting point
answer:
A plastic toy reduced to a puddle was left on a?


question:
Fact: amphibians undergo metamorphosis
answer:
When a frog is born, it has tiny gills so that it can breathe underwater, even though in adulthood it will?


question:
Fact: plants absorb nutrients from soil into themselves through their roots
answer:

What absorbs nutrients from soil into themselves through their roots?