What theories can be used to establish negligence?

Some common theories used to establish negligence include the "reasonable person" standard, which evaluates whether a person's actions were reasonable in a given situation; the "duty of care" concept, which assesses whether the defendant owed a duty of care to the plaintiff; and the "breach of duty" principle, which examines whether the defendant failed to meet the required standard of care. Additionally, the theory of "proximate cause" is used to determine whether the defendant's actions directly caused the plaintiff's harm.