The imaginary line located at 0 degrees latitude is referred to as what?

The imaginary line at 0 degrees latitude is known as the Equator. It serves as the primary reference point for latitude measurements, which are used to define how far north or south a location is from the Equator. The Equator divides the Earth into the Northern and Southern Hemispheres and is significant in geography and climate, as regions near the Equator typically experience a warm climate year-round due to direct sunlight.

The other options, although important in understanding Earth's geography, refer to different concepts. The Prime Meridian is located at 0 degrees longitude and is the reference line for measuring longitude; it does not pertain to latitude. Longitude itself refers to vertical lines that run from pole to pole, measuring how far east or west a location is from the Prime Meridian. The Arctic Circle defines a latitude region in the Northern Hemisphere, specifically at approximately 66.5 degrees north, and is not associated with the zero-degree latitude line.