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.

[Q]: Question: Dwayne Johnson is weaker than Kevin Hart because he exercises less and therefore his muscles have grown 
 Answer: smaller.
[A]: Exercising muscles increases their size, and bigger muscles have greater strength.


[Q]: Question: If Milo increases the frequency on his shortwave radio, it does what to the amount of energy the radio is producing? 
 Answer: increases
[A]: Shorter wavelengths (higher frequencies) correspond to higher energies and thus hotter star temperatures.


[Q]: Question: Willard dug up a rock from down deep, and realized it was _____. 
 Answer: old
[A]:
Therefore, deeper rock layers must be older than layers closer to the surface.