How might people use the land to make a living in the drier rural parts of the region, such as Somalia or Namibia?

Agricultural use

Explanation:

The people in places such as Somalia or Namibia which has drier rural parts in the region usually make use of the land to make a living through Agriculture.

They mostly practice arable farming which consists of the planting of crops such as wheat and barley in such hot and dry region. This brings a source of income to the people.

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the telephone is the answer