Which term refers to the southernmost point of a latitude line?

The southernmost point of a latitude line is indeed the South Pole. This location is located at 90 degrees south latitude, marking the extreme point in the southern hemisphere. The equator, which is the central latitude line located at 0 degrees latitude, serves as the reference point from which other latitudes are measured, but it is not a southernmost point.

The Prime Meridian, on the other hand, is the line of longitude that is defined to be 0 degrees, running from the North Pole to the South Pole through Greenwich, England.

The North Pole is located at 90 degrees north latitude, representing the northernmost point of the Earth's surface.

Understanding these geographical terms is crucial for navigation and mapping, as they help to define locations on the globe relative to one another.