Answer :
The frustration-aggression hypothesis views aggression as "motive to aggress and that aggression is caused by frustration".
It was set forward by Dollard et al. and depends on the psychodynamic clarification of catharsis. Freud trusted the drive for aggression was intrinsic, similar to the drive for nourishment. He trusted that the best way to decrease aggression is to take part in an action which discharged it.