Which type of geographic feature served as a barrier that protected ancient China but through which the Aryans found a route to ancient India? Plateaus
Plateaus

Deserts
Deserts

Mountains
Mountains

Rivers

an expansion is one of two basic business cycle phases; the other is contraction. the transition from expansion to contraction is a peak, and the changeover from contraction to expansion is a trough.

well this is going to be a long answer lol ok so the visigoths were a branch of the goths who frequently raided rome, uh the hunas attacked the guptas a lot and weakened them, uuhm of course the romans used math and science in there every day lives i mean they had a whole empire to run, and rome was split into east and west by a general named diocletian. hope this you! : )

silk

indigo  

rice

all the other answers are wrong

i believe out of the choices it is a.