What is the predominant vegetation zone in the northern part of Africa around the Tropic of Cancer?

please help

What is the predominant vegetation zone in the northern part of Africa around the Tropic of  Cancer?

desert and dry shrub

In the northern part of Africa around the Tropic of Cancer is situated the Sahara Desert - the largest desert in the world, where the vegetation is formed by grasses and bushes shabby. The vegetation in the oases is maintained by groundwater.

answer; is roughly two weeks;