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Why is it necessary for animals to have a circulatory system? O to move blood O to breathe O to maintain homeostasis O to exchange materials with its environment
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Why is it necessary for animals to have a circulatory system?

O to move blood
O to breathe
O to maintain homeostasis
O to exchange materials with its environment

User MechanisM
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Answer:

to breathe

Step-by-step explanation:

User Tal Cohen
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