Sort these is order.
1 .
agriculture
farming
2 .
north
along the coast
3 .
caravans
extremely cold
4 .
deserts
steps
5 .
fertile valleys
surface of the sea
6 .
sea level
traders
7 .
coastal plain
reason for wars
8 .
geography
almost waterless
9 .
terraces
at the top of a map
10 .
arctic
study of earth and what is on it