Answer:
they hunted food and collected berries. they even grew crops.
they would chase animals into a pit or a pit full of water and
when they were in the pit, they would throw spears to kill
them.
they hunted animals and they collected lots of berries and fished for fish like Chinook, Steelheads, and they would use the Nez Perce horses to catch up to the buffalo or whatever they were hunting and threw a spear or a weapon at it.