How have people in north africa modified the environment to make it more suitable for farming?

a.
they have constructed terraces on mountainsides to create more farmland.

b.
they have used slash-and-burn agriculture to enrich the soil.

c.
they have imported crops that grow well in a dry environment.

d.
they have used irrigation to carry water from rivers to crops.

which of the following sets ethiopia apart from other nations in northeastern africa, such as sudan and egypt?

a.
it has a large urban population.

b.
it has no ethnic minorities.

c.
its dominant religion is christianity.

d.
its people have adapted to a dry desert climate.

which of the following correctly describes patterns of ethnicity in africa?

a.
members of ethnic groups always practice the same religion.

b.
in most african countries, no single ethnic group makes up the majority of the population.

c.
members of ethnic groups rarely speak the same language.

d.
in most african countries, ethnic minorities are usually recent immigrants or the descendants of immigrants.