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: If Mona is comparing the erosion rates of two rocks and she notices that granite is softer then marble, which rock will water erode slower?
Answer: marble
[EX A]: The water erodes the softer rock faster than the harder rock.

[EX Q]: Question: When waves in the ocean go fast there will be
Answer: more
[EX A]: A: As the car approaches the radar gun, the reflected microwaves get bunched up in front of the car. Therefore, the waves the receiver detects have a higher frequency than they would if they were being reflected from a stationary object. The faster the car is moving, the greater the increase in the frequency of the waves.

[EX Q]: Question: Milo lives in a small city, but the city has recently begun to experience an influx of people moving to it. As people move there and demand for water decreases, what happens to the availability of water in Milo's city?
Answer: increases
[EX A]:
The availability of water is projected to get worse as demand increases.