According to the Law of Conservation of Matter, what happens to atoms of gas in a balloon when it is placed in the freezer?

the number of atoms stays the same and the energy stays the same, keeping the volume the same


the number of atoms stays the same as the atoms lose energy to the colder freezer, slow down, get closer together, shrinking the volume


the number of atoms increases, causing an increase in energy and an increase in volume


the number of atoms decreases, which takes up less space and decreases the volume