What is the primary geographical feature in the western United States?

rivers

hills

islands

mountains

On this graph, the top horizontal line represents a price floor set above equilibrium. a price floor set below equilibrium. a price ceiling set above equilibrium. a price ceiling set below equilibrium.

The impact of a large asteroid comet with earth has been proposed to have caused the extinction of the dinosaurs. the impact site of this comet is in or near

Why did other countries want to have a part in what was occurring in southwest asia?