Answer:D. Water has a neutral pH.
Explanation:
Exchanging oxygen and carbondioxide between air and lungs because it just involves breathing system but everything else involves hormones.........
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If an invasive species is added into a food chain/web, it becomes overpopulated/a pest because it has no natural predators.
It can also disrupt the food chain/web by eating the food supplies of the native organism leading to competitions.
