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

Input: Consider Input: Ocean ridges formed by marine invertebrates living in warm shallow waters within the photic zone of the ocean are called coral reefs.

Output: Ocean ridges formed by marine invertebrates living in warm shallow waters within the photic zone of the ocean are called what?

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

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

Input: Consider Input: When we move down a group of elements on the periodic table, their electronegativity it decreases.
Output: When we move down a group of elements on the periodic table, what happens to their electronegativity?