A 1000
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Some species are able to reproduce at a fast rate, creating large populations that ensure some individuals will survive.
All starfish limbs are designed to do have the same function, which means that in case a limb is severed, the other arms can make up for it until the arm regrows, which it does after a while. They are all connected to the center of the starfish which should not be damaged.
Answer:
continuous flow of energy and cyclic flow of matter in nature