Final answer:
The Isthmus of Panama is the narrow strip of land between the Caribbean Sea and the Pacific Ocean that connects North and South America and is the correct answer for the provided question options.
Step-by-step explanation:
The narrow strip of land that lies between the Caribbean Sea and the Pacific Ocean, linking North and South America, is known as the Isthmus of Panama. This isthmus serves as a land bridge between the continents and is the location of the Panama Canal, which was built between 1904 and 1914 by the United States to connect the Atlantic and Pacific Oceans. The region of Central America, of which the Isthmus of Panama is a part, consists of several republics extending from Mexico to Colombia, with a mountainous backbone featuring many volcanoes within its ranges. The climates in this region are predominantly tropical, classified as type A climates, with variations due to elevation in the highland interior.