Answer:
Plate movement
Step-by-step explanation:
It is known as the Rift Valley or the Great Rift Valley the set of tectonic faults, formed 35 million years ago with movement of the tectonic plates of Africa and Arabia, which cut the eastern part of Africa, from Lake Malawi to the Horn from Africa, where it creates a fork between Eritrea, Djibouti and Somalia, the Afar Triangle.
The Great Escarpment, in turn, was also caused by the movement of the tectonic plates and is characterized as a portion of rugged relief that, many times, extends, straight or sinuous, for a great extent in the form of cliffs.