Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. emissions.
Context: The sentence talks about the increase of greenhouse gases due to human activity, which is referred to as emissions.
Meaning of the words:
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Retentions – means keeping or storing, incorrect.
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Immersions – means submerging in a liquid, incorrect.
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Emissions – correct, means the release of gases into the atmosphere.
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Collections – means gathering, incorrect.
Correct word: Emissions, because it describes the release of greenhouse gases causing global warming.
Final Sentence: The atmosphere and oceans are warming due to increasing emissions of greenhouse gases, largely caused by burning fossil fuels.
Hence, the chosen option is correct.