Option 1: A comet is a celestial object composed of ice, dust, and gas that orbits the sun. It does not have any relation to a supernova.

Option 2: An asteroid is a rocky and metallic object that orbits the sun. It is not related to a supernova.

Option 3: This is the correct answer. A supernova is the explosive death of a massive star. It occurs when the star exhausts its nuclear fuel and collapses under its own gravity, producing a powerful explosion that can briefly outshine an entire galaxy.

Option 4: A black hole is a region in space where the gravitational pull is so strong that nothing, not even light, can escape. While a supernova can form a black hole, they are not the same thing.

In conclusion, a supernova is an exploding star, making option 3 the correct answer.