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: If Jim lowers the temperature of water in his bathtub, what happens to the density of the water? 
 Answer: increases

A: Water becomes more dense when it is colder and when it has more salt.
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Q: Question: When people move to an area what happens to the land? 
 Answer: cleared

A: More people also means more clearing of land for agriculture and development.
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Q: Question: Dan is pulling his car up a hill, and wants to pull it with as little force as possible. In order to do this effectively, Dan will need to use how many rope segments 
 Answer: more

A:
The more rope segments on a pully that are helping to do the lifting work, the less force that is needed for the job.
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