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

Ex Input:
Resonance is the term for the use of two or more lewis structures to represent the covalent bonding in a molecule.

Ex Output:
What is the term for the use of two or more lewis structures to represent the covalent bonding in a molecule?

Ex Input:
Neutrophils provide an early, rapid, and nonspecific defense against invading pathogens.

Ex Output:
What provides an early, rapid, and nonspecific defense against invading pathogens?

Ex Input:
Bond energy holds atoms together.

Ex Output:
Which type of energy holds atoms together?