The correct answer is; Tarantism.
Further Explanation:
In both the 15th, 16th, and 17th century people who had mental and psychological illness would do bizarre things in the public. They would start dancing when there was no music, this was called "Tarantism."
In those days, they did not have modern doctors and psychologists that we have now. The people in the towns, where people suffered from this ailment, thought they had been bitten by a tarantula, black widow, or wolf spider.
This was also called "dancing mania" since the people who suffered from this would dance manically in the town square. This was common in Italy.
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Answer:
It is important because it keeps the other animals in check.
Explanation:
They keep the animals in check so there isn't an overpopulation of a certain animal.
Let's take sea otters for an example, the sea otters keep the sea urchins in check so they don't eat all the kelp. When there was a massive decrease in sea otters due to orcas eating them, the kelp was disappearing and the sea urchins were growing in population.
They lived in Northern California , from the Pacific Ocean to Clear Lake .
Polluted water, plants dying and structures corroding.