Answer:
The Hudson bay
Step-by-step explanation:
The Canadian Shield refers to the large and extensive area that is comprised of Precambrian igneous rocks as well as metamorphic rocks of higher grade. These rocks together form the base (shield rocks) of the North American continent.
The Hudson bay is considered to be a large basin present in the northeastern part of Canada, that is present mostly in the middle of this shield, which cuts the rocks of the Canadian shield. It is comprised of a large amount of salt-water.