Lines of which measurement run north to south, meeting at the poles?

Longitude refers to the measurement of distance east or west of the Prime Meridian, which is an imaginary line that runs from the North Pole to the South Pole. These lines are also known as meridians, and they converge at the poles. Since they indicate positions on the Earth's surface relative to the North and South Poles, they are instrumental in navigation and understanding geographic coordinates.

In contrast, latitude refers to the measurement of distance north or south of the Equator and consists of lines that run parallel to the Equator. Elevation is concerned with height above a specific reference point, often sea level, and does not have directions like north or south. Distance is a general measurement of space between two points and does not pertain to geographical lines or coordinates in the way that longitude does. Therefore, the concept of longitude aligns perfectly with the description of lines that run north to south and meet at the poles.