Answer :
Final answer:
The three principal mountain chains in Canada are the 4) Rockies, the Appalachian Mountains, and the Innutian Mountains, each with its unique characteristics and significance.
Explanation:
The three principal mountain chains in Canada are the Rockies, the Appalachian Mountains, and the Innutian Mountains. The Rockies are a prominent mountain range that stretch from the southern United States up into Canada, known for their significant role in Canada's geology and resources.
The Appalachian Mountains are an ancient range that extends into Canada from the United States, with a history of influence on the continent's development. The Innutian Mountains are located in the far north of Canada and are less well known than the other two ranges, but important nonetheless in the context of Canada's geographical features.
