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.
It is called a drainage basin
Explanation:
I don't have time for yourself
The people and illegal transporting of goods if they wanna regulate trade