Final answer:
Aggression fulfilling a need or desire without intent to cause pain is known as Instrumental aggression, characterized by goal-oriented motives.
Step-by-step explanation:
Aggression used to fulfill a need or desire is called Instrumental aggression. This type of aggression is motivated by achieving a goal and does not necessarily involve intent to cause pain. In contrast to hostile aggression, which is driven by anger and the intent to cause pain, instrumental aggression could involve situations such as a contract killer performing an act for hire, where the underlying motivation is to achieve an objective rather than to inflict pain for its own sake.
This type of aggression is motivated by achieving a goal and does not necessarily involve intent to cause pain. An example of instrumental aggression would be a contract killer who murders for hire.