TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Competive exclusion princple explains why two different species cannot occupy the same niche in the same place for very long.

SOLUTION: What explains why two different species cannot occupy the same niche in the same place for very long?

PROBLEM: Diabetes is unpreventable in the type one form but may be prevented by diet if it is of the second type.

SOLUTION: What disease is unpreventable in the type one form but may be prevented by diet if it is of the second type?

PROBLEM: Heart disease is the leading cause of death in the united states.

SOLUTION:
What is the leading cause of death in the united states?