Dancing David
Penultimate Amazing
Well, resistance or opposition to what gravity does to a particle/object can be many things: all three standard model forces (including the action of EM), Pauli's Exclusion Principle (not one of the four forces), what I refer to as the neutral barrier (it separates two neutral objects because EM doesn't interact between them) and hence it is not quantum EM activity.
Which is exactly where you appear to be understanding the model incorrectly.