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.

Question: Gerald laid down many rock layers. The layers on the bottom level were likely laid 
 Answer: first
Lower rock layers were laid down earlier, so they are assumed to contain older fossils.

Question: Mona is excavating a deep tunnel as part of an exploratory committee. As she bores deeper in to the Earth, what can she expect will happen to the temperature? 
 Answer: increase
Temperature increases with depth inside the Earth, so melting of rocks is more likely to occur at greater depths.

Question: When you work out at the gym a lot your muscles become 
 Answer: larger

Muscles that are exercised are bigger and stronger than muscles that are not exercised.