Final answer:
The main source of tort law is case law, which is developed through decisions made by judges in previous cases.
Step-by-step explanation:
The main source of tort law is case law. Tort law is a branch of law that deals with civil wrongs and provides remedies for those who have been harmed by someone else's actions. The development of tort law is primarily based on the decisions made by judges in previous cases and the principles established through these decisions.