(A) ** Isthmus
(B) island
(C) river
(D) peninsula
EXPLANATIONS BELOW
Concept note-1: -The Panama Canal stretches 77 kilometers (48 miles) across the isthmus, and allows cargo ships to travel from eastern North America to western North America without having to go around South America.
Concept note-2: -Even though it is only a tiny sliver of land, relative to the sizes of continents, the Isthmus of Panama had an enormous impact on Earth’s climate and its environment. By shutting down the flow of water between the two oceans, the land bridge re-routed currents in both the Atlantic and Pacific Oceans.
Concept note-3: -Isthmus of Panama, Spanish Istmo de Panamá, land link extending east-west about 400 miles (640 km) from the border of Costa Rica to the border of Colombia. It connects North America and South America and separates the Caribbean Sea (Atlantic Ocean) from the Gulf of Panama (Pacific Ocean).
Concept note-4: -A great water tollway often called the “Big Ditch, ” the Panama Canal links the Atlantic and Pacific oceans. It weaves across a strip of tropical land where the Isthmus of Panama narrows in the shape of a long flattened letter S.
Concept note-5: -The Isthmus of Panama In Panama, the shores of the Atlantic and Pacific Oceans are only about 60 km apart. The Panama Canal uses this unique feature of the Isthmus of Panama. It allows ships to go from the Caribbean Sea to the Pacific without sailing around South America.