In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

[Q]: Question: What are drilled to monitor groundwater pollution? Answer: test wells
[A]: Test wells are drilled to monitor groundwater pollution.


[Q]: Question: Which weather event usually includes heavy precipitation, strong winds, and surface air temperatures below 0°C? Answer: blizzard
[A]: A blizzard usually includes heavy precipitation, strong winds, and surface air temperatures below 0°c.


[Q]: Question: What is the opposite of rarefaction zones, where air molecules in waves are loosely packed? Answer: compression zones
[A]:
Compression zones is the opposite of rarefaction zones, where air molecules in waves are loosely packed.