Which lines run east to west around the globe?

Latitude lines run east to west around the globe and are important for navigation and geography. They are parallel to the Equator, which is at 0 degrees latitude, and they help to measure how far north or south a location is from the Equator. Each degree of latitude is approximately 69 miles apart on the Earth's surface, making these lines essential for determining geographical coordinates.

The other terms do not match the direction or purpose of latitude. Longitude lines run north to south and measure distances east or west of the Prime Meridian. Altitude refers to the height of an object above a reference point, usually sea level, and does not pertain to lines on the globe. Equidistance typically relates to distances being equal, either in terms of space or measures, and does not describe any geographic lines. Therefore, latitude is the correct term for the lines that run east to west.