TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Simple kind of diffusion do small hydrophobic molecules squeeze through lipid molecules.

SOLUTION: What kind of diffusion do small hydrophobic molecules squeeze through lipid molecules?

PROBLEM: Digestion begins in the gastrovascular cavity.

SOLUTION: Where does digestion begin?

PROBLEM: Nonmetals have the highest attraction for electrons.

SOLUTION:
What elements have the highest attraction for electrons?