Killings directed towards a large group of people
They moved around (though the cowboys were herding cattle, whereas the Native Americans were following the buffalo). They cared for the cattle (eg by bog-riding and from line-camps) in a way similar to the way Native American dog-soldiers cared for the buffalo.
Commodity money is something that used as the medium of exchange that has value in its own right. For example, gold, silver, cigarette. representative money is commodity backed money.
B. impact of the plague on population. I got u.
