Which system is considered the body's pleasure center? O digestive system
O limbic system
O circulatory system
O nervous system

I think it’s the limbic system.

Explanation:

Not 100% sure but I’ve read something and this answer just looks familiar

answer: the first 2nd and last one

explanation:

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the maintenance of fluid balance during exercise. author information: fluid supplementation is necessary for exercise in which fluid losses must be offset by intake to avoid the negative effects of hypohydration on health and performance.