The correct answer is option 1 - Equator. The Equator is an imaginary line that divides the Earth into the Northern Hemisphere and the Southern Hemisphere. It is located at 0° latitude, meaning it is at an equal distance from both the North Pole and the South Pole. The Equator is the longest parallel of latitude on the Earth`s surface, and it is approximately 40,075 kilometers in length. It is an important line of reference for determining climate zones and for measuring distances around the globe. Along the Equator, the climate is generally warm and tropical, and it is also the region where the sun is directly overhead at noon on the equinoxes.