Northern Argentina is closer to the equator than southern Argentina is.
The equator does not cross Argentina.
The Equator is north of both the South Pole and Argentina.
I suppose that depends which way your map is printed.Argentina is entirely south of the equator.
Argentina
Northern Argentina is closer (about 1500 miles or 2400 kilometers south of the equator). Argentina (and most of South America) is south of the equator, so northern Argentina is closer to the equator than southern Argentina. (Argentina extends from about 22°S to about 55°S latitude.)
Nine of the 13 South American countries touch or are below the equator. There are three that are crossed by the equator; they are Ecuador, Columbia, and Brazil. There are six that are wholly south of the equator; they are Peru, Bolivia, Chile, Paraguay, Argentina, and Uruguay.
Argentina
No, quite the opposite. There is no part of Spain or Argentina that sits on the equator. All locations on the equator are in other countries.
Argentina extends from about 20° south latitude to about 55° south latitude. The points in Argentina that are closest to the equator are about 1400 miles (2250 km) south of the equator.
The northern half of Argentina is closer to the equator than the southernmost point in Spain.
People in most of Argentina are closer to the equator than people in southern Spain. Spain is between 37 and 43 degrees north of the equator. Only 20% of Argentina is more than 37 degrees south of the equator.