Concept:The Equator (0∘ latitude) is the imaginary line drawn around the middle of the Earth, exactly halfway between the North Pole and the South Pole.Solution:It divides the Earth into two equal halves: the Northern Hemisphere and the Southern Hemisphere.The other latitudes have special names: 2321∘ N is the Tropic of Cancer, 2321∘ S is the Tropic of Capricorn and 6621∘ N is the Arctic Circle. None of them is halfway between the poles.Answer:Option A (0∘)