What is the definition or description of: aggression?

Damaging behavior: Complex, no single definition brief it is the behavior directed at an animate or intimate object resulting in damage. Be it physical, verbal, or emotional, the object always suffers damages that can be as severe as death or total incapacity. Predatory, sex-related or inter-male aggression are examples observed and induced by need for sustenance, competing for mate and dominance respectively.

Physical restless wa: Physical and psychological restlessness.