You can get an underwater mountain range like the Mid-Atlantic Ridge. Normal faults occur at divergent boundaries.
The Sahel is located in Africa. It is the region in Africa that transitions from the Sahara to the Sudanian Savanna. It stretches across in the region from the West of Africa to the East and includes parts of Senegal, Mauritania, Mali, Burkina Faso, Algeria, Niger, Nigeria, Chad, Sudan, South Sudan, Eritrea, CAR, Cameroon, and Ethiopia.
Answer:
B.
I could wrong that because there many theory.
I choose B that because my feelings think B make any sense?
During the process of eruption the volcanoes shake in order for the lava to move quickly