Which alternative completes the sentence correctly? ...

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Q190811 Inglês
Which alternative completes the sentence correctly?
Unlike the atmosphere, which ____(1) by turbulent weather systems,
the deep waters are fairly stable. This is because it ____ (2) from
above, in contrast to the atmosphere, which ____ (3)from below.
(Adapted from http: / /www.global-greenhouse-warming.com/ oceans.html)

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