What can you assume has happened if an electron moves to a higher energy level

The extra energy that the electron suddenly has had to

come from somewhere, so I can assume that one of

two things happened:

either 1). A photon passed by and the electron absorbed it.

or 2). Somebody hooked up a battery or a generator in

such a way that the electron was bathed in a field of electrostatic

potential, and suddenly had the get-up-and-go to jump to a higher

energy level, and possibly even to leave its atom completely and

zip over to a neighbor atom.