You use energy to heat your home. what ultimately happens to the energy that you pay for in your heating bill?

You use energy to heat your home. What ultimately happens to the energy that you pay for in your heating bill?
1. The energy escapes your home and heats
the outside.
2. The energy heats your home.
3. The energy disappears as it never exists.
4. The energy changes to mass.

Look it up you feel me

Answer8.0m;