instruction:
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:
Question: When a device become less efficient, its production of usable energy will go 
 Answer: down
answer:
The more efficient a device is, the greater the percentage of usable energy it produces.


question:
Question: A smoker's body works _____ just to get needed air. 
 Answer: more
answer:
When a person smokes there are chemicals released by the tobacco that enter the lungs. Because the lungs have to work harder to remove the chemicals, the body has to work harder to get the air needed to survive.


question:
Question: If there are more crests coming through, there will be _____ wave frequency. 
 Answer: more
answer:

Wave frequency can be measured by counting the number of crests or compressions that pass the point in 1 second or other time period. The higher the number is, the greater is the frequency of the wave.