Aggression is defined as hostile or violent behavior. [1] Person A pointing a pretend gun at a politician's head could have resulted from spending time with a group that engages in similar threatening behaviors. [2] Child B stealing money left unattended could have been influenced by the excitement of Halloween costumes providing a sense of anonymity. [3] The identical twins' involvement in organized crime including violence may have been due to growing up in a time and place where such criminal behaviors were normalized or even glorified within their social circles. [4] Child E mimicking violent acts and words from a TV show could have been caused by the modeling of aggression she observed in media influencing her