Question

two or more atoms of different elements that are chemically combined.
12
2
9
compound

Explanation:

The question is about the definition of a compound, which is two or more atoms of different elements chemically combined. The term "Compound" is in the red box, so that's the correct label for the definition.

Answer:

Compound (the term in the red box corresponds to the definition "Two or more atoms of different elements that are chemically combined")