Why must arctic fish produce 'anti-freeze chemicals' to survive in icy waters?

So they don't freeze to death.

I hope I helped please leave thanks

Three reasons of the deaths of native americans: new illnesses that their immune systems couldn't cope with. genocides so the settlers could have the good land.starvation from lack of rations and poor infertile land on resevations

The diaphragm is what i think ur talking about