Please help my little sibling fr needs it . thank u !

1 is C

2 is A

3 is B

Explanation:

1 - the cow is breathing and releases carbon dioxide the tree absorbs it and releases oxygen

2 - the cow Is breathing that's why it releases carbon dioxide

3 - the human takes in oxygen but breaths out carbon dioxide

the man is bald so he has no hair to get wet

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."