Match the items.
a. drought
b. delta
c. farming
d. desertification
e. shifting agriculture
f. cash crop
1. agricultural products grown to be sold
2. a broad, triangular-shaped land area at the mouth of a river
3. change causing an area to become more arid subsistence
4. long period of dry weather resulting in water shortages
5. farming system in which farmers use a land area until its nutrients are depleted and then move to a new location
6. growing crops to provide for the needs of one's family