Answer:
Compound.
Step-by-step explanation:
A compound is a made up of two or more than two different elements. It can be broken down into smaller molecules.Elements are combined to form a compound by chemical bonding like ionic bonding and covalent bonding.
Different compounds of different elements can be broken down into the chemical reaction called decomposition reaction. For example:
Using electrolysis, we can break down water into its elements hydrogen and oxygen.