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

[EX Q]: Question: If Mona is comparing two organisms and she notices that one has a very hard shell and one has a very soft shell, which one will turn into a fossil less easier? 
 Answer: soft shell
[EX A]: Hard shells fossilize more readily than soft bodied organisms, as they are better at resisting decay, take significantly longer to break down, and have a greater chance of surviving burial under layers of sediment.

[EX Q]: Question: John was studying skin disease in his research lab. He observed that the more UV rays that contact the skin resulted in skin cancer rates becoming 
 Answer: Larger
[EX A]:
More UV rays increase skin cancer rates.