________ is a necessary element of virtually all aggression.

A) Psychological harm
B) Intent to harm
C) Physical harm
D) Anger

Intent to harm is a necessary element of virtually all aggression because it involves the conscious decision or desire to cause harm, whether physical or psychological. While anger may be a common motivator for aggression, it is not always present and can be directed in non-aggressive ways. Physical harm may also not be a necessary element, as alternative forms of aggression such as verbal or relational aggression do not involve physical harm.