Comets affect the earth by option D. They are the particles that produce meteor showers.
Comets are frozen leftovers from the formation of the sun gadget composed of dust, rock, and ice. They range from some miles to tens of miles extensive, but as they orbit in the direction of the solar, they warm up and spew gases and dust into a sparkling head that can be large than a planet.
Comets are heavenly bodies that revolve across the sun in an elongated orbit. Meteoroids are small rock portions that revolve across the sun. they're commonly made from dust, ice particles, and gases. A comet is a celestial body that moves across the solar, and as it goes near the solar it paperwork a vapor trail of dust and gas that streams after it. An instance of the comet is Haley's.
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A. They are the particles that produce the lights of auroras.
B. On rare occasions, they can blanket our entire atmosphere with dust.
C. They have been implicated in mass extinctions, including the extinction of the dinosaurs.
D. They are the particles that produce meteor showers.