The answer is observations
The answer is C.... Hope this could help
Nonpoint source pollution is a greater hazard, because scientists are not able to identify a single location the pollution came from. It is harder to find a solution if they are unable to find the source.
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have a great day.
Answer: El Niño is a part of a routine climate pattern that occurs when sea surface temperatures in the tropical Pacific Ocean rise to above-normal levels for an extended period of time.
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<em>hope this helps !_!</em>
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ENJOY groovie DAY</u></h2>