The answer is erosion that's what made the formation grand canyon
The terrestrial planets ranked in order of decreasing atmospheric density are Venus, Earth, Mars, Mercury. A terrestrial planet, telluric planet, or rocky planet is a planet that is composed primarily of silicate rocks or metals. Within the Solar System. It is the terrene planets are the inner planets nearest to the Sun.
Pan Arabism is a political movement promoting the idea in which Arabs should unite in forming one country or a state. The idea was first done during 1800s in the later part and 1900s.If this stayed it would have led to greater unity for Arab and countries like Egypt and Syria could have stayed united which is the answer.
My choice would be D, because Mount Everest is located in landlocked Nepal.
