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: 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: Sarah ate a piece of shark meat for dinner, Sarah's levels of toxic metals have 
 Answer: increased or

Answer: The higher up a food chain that humans eat, the greater the levels of toxic metals they take in.


Question: Question: Mo has a wave with a short wavelength. He notices the wavelength shrinking over time. The wave now has _____ energy. 
 Answer: more

Answer:
Waves with shorter wavelengths have more energy.