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.

Question: Sandra is in a dark building and then suddenly goes exits onto a sunny street. Sarah's pupils will do this in response to the new bright light 
 Answer: shrink
The pupil automatically gets bigger or smaller to let more or less light in as needed.

Question: If Mona owns a car and she decides to switch to a cleaner burning fuel, will she create more or less pollution? 
 Answer: less pollution
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: A wave with less energy than another will have a _____-frequency. 
 Answer: lower

A higher-frequency wave has more energy than a lower-frequency wave with the same amplitude.