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 Q]: Question: Simon was digging in his yard and found that the rocks that were deeper in the ground, compared to the surface rocks, were likely 
 Answer: older
[EX A]: Therefore, deeper rock layers must be older than layers closer to the surface.

[EX Q]: Question: Dan notices that there were no new trees planted this year. Since there are so few trees in the area, Dan expects the air to be 
 Answer: dry
[EX A]: With fewer trees, the air is drier and droughts are more common.

[EX Q]: Question: If Jim increases the frequency of the radio waves on his shortwave radio, will the radio use 
 Answer: more or
[EX A]:
In electromagnetic waves with higher frequencies, photons have more energy.