Answer: They primarily originate from two regions: the Kuiper Belt, and the Oort Cloud
Explanation: A comet is a celestial body consisting mainly of ice, dust and gas in a (usually very eccentric) orbit around the Sun and having a "tail" of matter blown back from it by the solar wind as it approaches the Sun. Comets generally are said to have two sources: the Oort Cloud which begets long-period comets and the Kuiper belt which begets short-period comets. Comets spend most of their lives in the distant reaches of the solar system and far away from the sun.