After studying the ocean currents and the 7-year cycle of volcanic eruptions for 30 years, researchers have concluded that increased volcanic activity leads to changes in ocean temperatures that impact marine ecosystems. This suggests that marine biologists could enhance their understanding of ecosystem changes based on this information.

Which of the following, if true, most seriously weakens the argument above?

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Correct answer marked below

Marine ecosystems are influenced by factors other than volcanic activity.

Researchers have proven that volcanic eruptions directly alter ocean temperatures.

The 7-year cycle of volcanic eruptions is not consistent across different regions.

Marine biologists have developed methods to predict ecosystem changes without considering volcanic activity.

Correct

It has been shown that ocean temperatures can fluctuate independently of volcanic activity.

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Explanation

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Official Explanation

Official

The argument states that increased volcanic activity leads to changes in ocean temperatures, which in turn impacts marine ecosystems. To weaken this argument, we need to provide evidence that suggests marine biologists can understand ecosystem changes without relying on volcanic…

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Comments

PranavApr 23, 2025

Thank for sharing!

AkhilMay 30, 2024

thank you taking time to upload it!

KrishFeb 5, 2024

Great

What this question tests

What it tests

Whether you can identify the option that most undermines an argument's conclusion.

Common trap

Choosing an irrelevant objection or one that attacks the premise rather than the reasoning.