Answer:
The rift valley formed when the crust pulled apart.
Step-by-step explanation:
The Great Rift Valley in Africa formed when the crust pulled apart along a divergent margin.
- Rift valley systems are produced within a continent at divergent margins within a plate.
- The rifting system makes the earth in that region prone to frequent earthquakes as the continents continues pulling apart.
- It results from the divergence of the Arabian plate and the Somalia/Nubian plate.
- It is one of the longest rift valley systems on earth.