Answer:a stationary front.
Explanation: 
they allow repeated thunderstorms to move across the same area.
 
        
                    
             
        
        
        
Both are large, rocky bodies in space but asteroids tend to stay in the asteroid belt, while meteoroids are a bit smaller and more active.
        
             
        
        
        
Answer:
The rift valley formed when the crust pulled apart.
Explanation:
The statement that best describes how the Great Rift Valley in Africa formed is that they formed when the crust pulled apart. 
- This is geologically known as divergence. 
- The Arabian plate and the Nubian/Somali plate are divergent plates. 
- They are currently moving apart and away from each other. 
- This creates a crack on the earth which is what formed the rift valley in Africa. 
- Along such margins, earthquake activities are prominent.