Final answer:
The Constitution Act of 1982 is important in Canadian history because it introduced the Charter of Rights and Freedoms and marked Canada's full sovereignty.
Step-by-step explanation:
The Constitution Act of 1982 is a significant document in Canadian history because it achieved something fundamental for the nation. The most notable aspect of the Act is that it brought about the Charter of Rights and Freedoms, which is a bill of rights granting Canadians essential freedoms such as freedom of expression, assembly, and religion, and it established the framework for the legal system's protection of individual rights and liberties. Moreover, the Constitution Act of 1982 is crucial because it marked the point at which Canada achieved full sovereignty, allowing it to amend its own Constitution without requiring approval from the British Parliament.