What is primarily enforced by the Supreme Court of Canada?

The Supreme Court of Canada primarily enforces constitutional law, which encompasses the interpretation and application of the Constitution of Canada, including the Canadian Charter of Rights and Freedoms. This aspect of law is critical because it governs the legal framework of the country and ensures that individuals' rights are protected from government actions. The Court often reviews cases that involve challenges to legislation or government actions that may infringe upon constitutional rights, making its role in enforcing constitutional law vital to maintaining the rule of law and democratic principles in Canada.

In the context of the other options, while the Supreme Court can occasionally deal with trade laws, provincial statutes, and civil disputes, these areas are not its primary focus. Trade laws and commerce are typically regulated by various governmental agencies and may end up in the court system, but the foundational aspect of constitutional interpretation takes precedence. Provincial statutes are enforced at the provincial level, and civil disputes can be handled in lower courts, making constitutional law the core responsibility of the Supreme Court.