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: Milo owns two telescopes, one at the top of a mountain and one at the base. If he looks through the one at the top of the mountain, how much interference can he expect compared to the one at the bottom of the mountain? 
 Answer: less
Many observatories are built on high mountains. There is less air above the telescope, so there is less interference from the atmosphere.

Question: If Mona works in a defense lab and her company develops worse missiles, what happens to the advancement of rocket technologies? 
 Answer: decreases
The development of better missiles fostered better rocket technologies.

Question: Rich has a rock from 1000 feet below the crust of the Earth, and he compares it to a rock on his driveway. Which rock is likely younger? 
 Answer: the driveway rock

Older layers are deeper in the Earth, younger layers are closer to the surface.