Which of these is a small, icy object consisting of gas and dust with a tail that streams away and orbits the sun? a. asteroid b. comet c. meteoroid d. star

B: Comet
They are composed of rock, dust, ice and frozen gases such as carbon monoxide, carbon dioxide, methane, and ammonia. Sometimes called dirty snowballs, recent studies have shown that the ice of a comet is covered by a crust. Comets also contain a variety of organic compounds as well as the gases already mentioned. They do indeed orbit the sun.