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: Sandra sees a huge glacier, and notes that it has smaller tributary glaciers flowing into it, in valleys that are 
 Answer: shallow
[A]: Smaller tributary glaciers, like tributary streams, flow into the main glacier in their own shallower U-shaped valleys.


[Q]: Question: A person is digging up rocks, and wants to get the oldest ones. The person will dig 
 Answer: deeper
[A]: Older rocks are at the bottom and younger rocks are at the top.


[Q]: Question: If Mona is holding two rocks in her hands and she moves them farther apart, what will happen to the force of magnetic attraction between the rocks? 
 Answer: decrease
[A]:
The smaller the distance between the objects, the greater the force of magnetic attraction.