Answer:
The suez canal and the persian gulf.
Explanation:
These 2 masses of water are both are key for international trade and economy, and have played major roles in human history.
The suez canal is a waterway that goes through Egypt, and connects the mediterranean sea to the red sea. By 2008, more than 20.000 vessels crossed the canal, and the total profit was of $5.381 billion.
The persian gulf, is as much as important, holding the world's largest source of petroleum. By 2002, the persian gulf nations produced about 25% of the world's oil.
