Why do you thinks crops are grown near an oasis ?

It always for water to get into the soil of the crops keeping them fertile

1.       Food-gatherers and hunters. They live faraway from rural-urban way of life and possess as simple type of organization.

2.       Permanent Settled Cultivators. They practice different kinds of agricultural cultivation working in their own fields and of others. Their organization is much developed and highly complex.

3.       Craftsmen. Some may retain their traditional crafts and represents their tradition as a whole.