Tort law governs civil wrongs and provides remedies for legal damages. The essential elements of a tort are: 1) a wrongful act or omission by the defendant, 2) legal damage to the plaintiff, and 3) a legal remedy. Legal damage can include violation of a legal right without actual harm (injuria sine damnum). One defense against tort liability is voluntary assumption of risk (volenti non fit injuria), but mere knowledge of a risk is not enough to invoke this defense - the plaintiff must have consented to the harm.