Question

A comet is a

meteoroid that travels through Earth’s atmosphere and hits the surface.
meteoroid that burns up in Earth’s atmosphere, producing a streak of light.
small, rocky object that orbits the Sun and is usually found in a belt between the orbits of Mars and Jupiter.
small object made of ice and dust that orbits the Sun and forms a coma as it approaches the Sun.

Answer 1

with the options given, the best answer is a small object made of ice and dust that orbits the sun and forms a coma as it approaches the sun.

Answer 2

A comet is a small object made of ice and dust that orbits the Sun and forms a coma as it approaches the Sun.

A comet is a small celestial body consisting mainly of ice, dust and gas in a (usually very eccentric) orbit around the sun and forming a coma, and sometimes having a tail of matter (gas and dust particles) blown back from it by the solar wind as it approaches the sun.