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:

Hello. You did not enter the text to which this question is related, nor did you show the answer options, which makes it difficult to prepare an answer.

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.

- "sack of constantinople, (april 1204). the diversion of the fourth crusade from the holy land to attack, capture, and pillage the byzantine city of constantinople divided and dissipated the efforts of the christians to maintain the war against the muslims. the fourth crusade was corrupted from its purpose early on."

- "the crusades were a series of religious wars undertaken by the latin church. the first crusade arose after a call to arms in 1095 sermons by pope urban ii. the first crusade unleashed a wave of impassioned, pious catholic fury, which was of constantinople, the capital of the christian-controlled byzantine empire."

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