The only force that can act on an object in free fall is

Gravity, but if you think about it, air resistance can slow the object down, thus meaning that there are 2 forces acting on the object, but just go with gravity

Ifound this on google “what are motifs? a motif is a literary term that is an idea, object, or concept that repeats itself throughout a text. a motif gives clues to theme or reinforces ideas an author wants to emphasize.” i hope this for what your looking for