Answer:
The answer is 3. Double Helix.
Lively is your answer.
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The human body has two type of feedback mechanism, positive and negative feedback. Positive feedback is a cyclic process that amplifies the action of a system until a negative feedback response is obtained. Positive feed back is important in processes that must go to completion quickly, for instance blood clotting. But it is harmful in situations in which stable conditions must be maintained, for instance body temperature, this is because it encourages departure from the state of stability.
Eukaryotes have higher survival rates, they also have the ability to be more self sustaining, as well as have more stable periods of homestasis than non-eukayotes.
