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

Compression zones is the opposite of rarefaction zones, where air molecules in waves are loosely packed.
What is the opposite of rarefaction zones, where air molecules in waves are loosely packed?

You see a faster reaction rate when the concentration of reactants is higher.
What kind of reaction do you see when the concentration of reactants is higher?

Angiosperm seeds develop inside chambers called ovaries, which originate within flowers and mature into fruits.
What develop inside chambers called ovaries, which originate within flowers and mature into fruits?