From the information provided, the correct categorization is that carbon and hydrogen are elements, and methane (CH₄) is a compound made from these elements.
So the best answer based on the options you provided would be: elements are carbon and hydrogen, and methane is a compound.
Thus, the accurate breakdown is:
- Carbon: Element
- Hydrogen: Element
- Methane (CH₄): Compound (made of carbon and hydrogen atoms)