Why was the city of Quebec so important to the defense of new France?

Quebec City was crucial to the defense of New France due to its strategic location along the St. Lawrence River, which served as a vital transportation route for trade and military movements. Its elevated position made it easily defensible against potential attacks, allowing the French to control access to the interior of North America. Additionally, Quebec was the administrative center of New France, making it a key hub for governance and military coordination in the region. Its fortified structures and strong garrison further enhanced its importance as a bastion against British encroachment.