Which of the following best defines tort law?

Tort law is fundamentally concerned with acts that result in harm or injury to individuals. It encompasses a wide range of civil wrongs where one party's actions or negligence leads to a loss or damage suffered by another party. This area of law aims to provide relief to the injured party and deter harmful behavior by imposing liability on the perpetrator.

By focusing on the harm caused, tort law allows victims to seek compensation for damages, including physical injuries, emotional distress, and financial losses, through civil litigation. The emphasis is on the wrongful act itself, which can arise from intentional actions, negligence, or strict liability.

The other options pertain to different legal concepts. Legal actions taken against a party can encompass a wide range of legal issues, not limited to torts. Claims for breach of contract specifically relate to disputes arising from contracts, while the negotiation of service agreements is a process relevant to contract law rather than tort law. Thus, the definition of tort law is best captured by the focus on acts resulting in harm or injury.