Final answer:
The Isthmus of Panama is the narrow strip of land that connects North and South America and hosts the Panama Canal, which links the Atlantic and Pacific Oceans.
Step-by-step explanation:
The narrow strip of land that lies between the Caribbean Sea and the Pacific Ocean that links North and South America is known as the Isthmus of Panama. This is the correct answer, option (a). The Isthmus of Panama not only serves as a land bridge connecting the two continents but is also the location of the Panama Canal. This canal is an important waterway completed in 1914, allowing ships to pass between the Atlantic and Pacific Oceans without the lengthy and dangerous voyage around the southern tip of South America. Central America, where the isthmus is located, has a mountainous backbone with many volcanoes and is characterized by tropical climates.