Twenty two thousand so the answer is c
<span>(4) active transport
</span>Active transport is the movement of molecules across a cell membrane in the direction against their concentration gradient, i.e. moving from an area of lower concentration to an area of higher concentration.
D. POPS.
Your answer is D because pesticides have aldrin, chlordane, .... which are all POPS.
It's biproducts or by cutting it open and find out.