I believe it should be 1. Hope this helps.
I would asy thd answer would be d if its not my bad .
It is d because pesticides run off into water, they are absorbed into soil , and they are left in the air , hope this helps :)
The body needs to maintain the amount of oxygen that reaches our cells. If we exercise a lot, our breathing rate increases. More oxygen enables our cells to <span>more quickly respire aerobically, so that our muscles can contract more rapidly.
</span>
Need picture sorry this wont help me
