A meteor is

A) a streak of light in the atmosphere.

B) an icy body with a long tail extending from it.

C) a chunk of space debris that has struck the ground.

D) an irregularly shaped body, mostly found orbiting between Mars and Jupiter.

A meteor is B) an icy body with a long tail extending from it.

Explanation:

Meteors are very small dust particles that, when penetrating into the Earth's atmosphere, burn quickly by rubbing with the gases of the same. Some meteors, those with larger dimensions and appreciable weights, are brighter and can describe longer trajectories, showing longer.

In other words, the meteoroids, celestial bodies can vary in size between 100 micrometers up to 50 meters, they collide with the atmosphere of our planet and if the particles are of a small size, upon impact they enter combustion creating a flash, is what we know as meteor or shooting star. Therefore, the meteor is a luminous phenomenon that leaves behind a persistent trail.

So, a meteor is B) an icy body with a long tail extending from it.