The southern tip of south america is closest to which continent?

The Southern tip of South America almost "joins" Antarctica - this is the correct answer.
The southern Tip of South America is close to the Antarctic Peninsula - this Peninsula is home to several research station and the most northern part of the continent. It has no indigenous population, except for penguins

Connecticut, delaware, maryland, massachusetts, new jersey, new york, new hampshire, north carolina, pennsylvania, rhode island, south carolina, virginia

Answer(a); // soil salinization and waterlogging;