Which selection from the article helps the reader understand that studying otters can help scientists understand the overall health of river ecosystem

Answer and Explanation:

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However, we can say that otters only live in ecosystems with clean water and a large amount of healthy fish. In this case, studying the ponds where the otters live and the places where they do not want to settle, shows scientists the ecosystems that are healthy and preserved and those that are not.

These information must be given in the article to convince readers that the study of otters can inform scientists about the health of ecosystems.

the secretary of state, appointed by the president with the advice and consent of the senate, is the president's chief foreign affairs adviser. the secretary carries out the president's foreign policies through the state department and the foreign service of the united states.

during the nancy. probs