(A) sources of hydroelectric power
(B) barriers against imperialism
(C) ** gateways to other places
(D) reservoirs for irrigation
EXPLANATIONS BELOW
Concept note-1: -The Panama Canal and Suez Canal are longtime rivals within the container shipping industry as both canals support the flow of global trade by shortening historical trade routes.
Concept note-2: -The Suez Canal is a man-made waterway connecting the Mediterranean Sea to the Indian Ocean via the Red Sea. It enables a more direct route for shipping between Europe and Asia, effectively allowing for passage from the North Atlantic to the Indian Ocean without having to circumnavigate the African continent.
Concept note-3: -The canal is an artificial waterway running north to south across the Isthmus of Suez in north-eastern Egypt; it connects Port Said on the Mediterranean Sea with the Gulf of Suez, an arm of the Red Sea.
Concept note-4: -The Panama Canal is a constructed waterway that connects the Atlantic and Pacific oceans across the Isthmus of Panama.