In traditional psychoanalysis, which tool is most likely to be the early focus of therapy as a way of bringing important issues to light?

The tool used psychoanalisys is the free association, which allows the patient to say everything that comes to his mind during the session trying not to have filters between what he thinks and what he says. In this way, according to Sigmund Freud, the propitious scenario is given for the unconscious to speak, which leads to exposing the resistances and then analyzing them in order to carry out the cure.