In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

Ex Input:
Question: Reid is modelling the greenhouse effect in a simulation. If he increases greenhouse gas levels, the greenhouse gas effect will
Answer: increase

Ex Output:
An increase in greenhouse gases leads to greater greenhouse effect.

Ex Input:
Question: Mike is digging for old rocks. Mike dig downs very, very shallow, and he expects the rocks there to be
Answer: younger

Ex Output:
Therefore, deeper rock layers must be older than layers closer to the surface.

Ex Input:
Question: If Jim wants to find a lower concentration of old fossil water he needs to move _____ into an aquifer?
Answer: shallower

Ex Output:
Deeper aquifers typically contain older 'fossil water.'