Answer:
comets with short orbit periods
Step-by-step explanation:
Comets are irregular rocky bodies composed of dust, frozen gases and ice. Most of the comets reside in Kuiper belt and Oort clouds. Kuiper belt is a region beyond orbit of Neptune. Comets orbit the sun in large elliptical orbits. Comets can be classified based on the period of their orbits. Comets which lie in Kuiper belt have period of orbit less than 200 years. Hence, these are known as short period comets where as long period comets reside in Oort cloud having orbital period of more than 200 years.