Question

as navigation skills advanced, explorers reached the area now known as the straits of magellan. the straits of magellan are located
south of chile and argentina.
at the southernmost point of australia.
between the south china sea and india.
at the southern tip of africa.

Explanation:

The Straits of Magellan is a navigable sea route in South America, separating mainland South America from Tierra del Fuego. Its geographic location is south of the countries Chile and Argentina.

Answer:

south of Chile and Argentina.