The answer they probably want is Hudson Bay. However, Hudson Strait also connects to Foxe Basin, north of Hudson Bay.
The bay that is connected to the Atlantic Ocean by the Hudson Strait is known as the Hudson Bay. Hudson Bay is the second largest bay in the world, located in northeastern Canada. It is bordered by the provinces of Ontario, Quebec, Manitoba, and Nunavut. The bay is named after the English explorer Henry Hudson, who sailed into the bay in 1610 while searching for the Northwest Passage.
