Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Ex Input:
Absorption is the process by which the substances you consume are taken up by the blood.

Ex Output:
What is the process by which the substances you consume are taken up by the blood?

Ex Input:
Exotic species are also called invasive species because they threaten other species.

Ex Output:
Why are exotic species also called invasive species?

Ex Input:
The pupil of the eye allows light to enter.

Ex Output:
What part of the eye allows light to enter?