What can be inferred about the defense mechanisms

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What can be inferred about the defense mechanisms of the sea cucumber?

They are very sensitive to surrounding stimuli.

They are almost useless.

They are similar to those of most sea creatures.

They require group cooperation.

Giải thích

Đáp án A
Thông tin: The sea cucumber will eviscerate and regenerate itself if it is attached or even touched; it will do the same if the surrounding water temperature is too high or if the water becomes too polluted.