Final answer:
Chile is the country that possesses the southernmost point of South America, known as the Diego Ramirez Islands. The Diego Ramirez Islands, the southernmost point of South America, are located in Chile.
Step-by-step explanation:
The country that has the Diego Ramirez Islands, which are the southernmost point of South America, is Chile. These islands are located south of the mainland of Chile and are often regarded as the southern frontier of the continent before reaching Antarctica. The region is remote and known for its rough seas and weather conditions.