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

Ex Input:
Limestone is insoluble in water, so acid can dissolve it.

Ex Output:
Limestone is insoluble in water, so what can dissolve it?

Ex Input:
Population is an important level of organization in ecology and the unit of microevolution.

Ex Output:
What is an important level of organization in ecology and the unit of microevolution?

Ex Input:
Altricial organisms are helpless at birth and require lots of help from their parents.

Ex Output:
What type of organisms are helpless at birth and require lots of help from their parents?