Answer:
D. They have used irrigation to carry water from rivers to crops.
Explanation:
Irrigated agriculture is widespread in North Africa, about 28% of farmlands in North Africa are irrigated. For example, Libya has the largest irrigation project in the world, called the Great Man-Made River which supplies farmlands across Libya with freshwater for cultivation.
People in North Africa essentially, irrigated farming to make their land more suitable for agriculture.
I Think The Answer Is outta A or B
Answer:
The alliance system, which were the triple alliance formed by Germany,Italy and Austria-Hungary and the Triple Entente formed by UK,France and Russia.
The alliance system had caused great suspicion among the nations, as the alliance system was meant to be kept secret. The nations would be wary that they were to start war as they found backups for themselves.
It also support a nation's will to start a war as they would have back up, this urged WWI to happen.For example, with the support of Germany (blank cheque) Austria-Hungary sent an ultimatum to Serbia,which was impossible for Serbia to fulfill, finally lead to the outburst of WWI.
In addition, the system would enlarge the war scale to become a world war as one another would be drag into the war if one were involved.
Explanation: