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.
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Question: Question: David turns down the temperature in the cabin, so energy of sound waves is moving 
 Answer: slower

Answer: At a lower temperature, particles of the medium are moving more slowly, so it takes them longer to transfer the energy of the sound waves.


Question: Question: Carol is building a small rocket to test in her back yard and, after much consideration, decides to use a biofuel to power her rocket. She tells her friends it's because it will create _____ carbon dioxide than fossil fuels. 
 Answer: less

Answer: The advantage to biofuels is that they burn more cleanly than fossil fuels. As a result, they create less pollution and less carbon dioxide.


Question: Question: Reid lives in a city with 5000 people. Eric lives in a city with 50000 people that is roughly the same size geographically. Whose city needs less resources? 
 Answer: Reid

Answer:
More people need more resources.