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: as flatness of a leaf increases , the amount of sunlight that leaf can absorb will increase
[A]: Which absorbs more sunlight?


[Q]: Fact: exercise has a positive impact on a human 's health
[A]: Who would be healthier?


[Q]: Fact: absorbing sunlight causes objects to heat
[A]:
Which object would be best at heating up in the sunlight?