4largest river systems in the u. s.a.

the graph shows the price of a good compared to the quantity supplied.

this graph demonstrates how

    [d]:   " the amount consumed greatly changes with the price. "

they were chasing the bread.

landlessness of ordinary people

^^something like that^^^

i'm sure the answer you are looking for would be

a. an ice age

hope this contact me if this didn't or you need with more answers : )