The one you have selected is correct. CO is a compound because it contains more than one element.
Explanation:
Many meteorites have iron or nickel in them, so they are heavier (and denser) than Earth rocks. Some meteorites have pits (regmaglypts) on the outside, which look like deep thumbprints. Meteorites are not bubbly, and do not have holes. Meteorite are usually not round.
They are organized into crystals hope i helped
The answer is the reaction ins a cold pack
