Choose all that apply.

people may have chosen to become sedentary because

a. surplus food meant others could learn different jobs
b. plows were easier to make than spears
c. farming created surplus crops to survive winter
d. large groups were safer
e. large department stores emerged

Which statements explain reasons why unconformities occur? check all that apply. rocks along a fault break and move. igneous rock forms at earth’s surface. rocks erode and sediment is deposited. no sediment is deposited over a long time. igneous rock forms between sedimentary layers.