Question

yukon is canadas westernmost territory.
saskatchewan

Explanation:

Identify the westernmost territory of Canada

Yukon is the westernmost territory of Canada, bordering Alaska to the west, the Northwest Territories to the east, and British Columbia to the south.

Verify the statement in the image

The image shows a fill-in-the-blank sentence: "[Yukon] is Canada's westernmost territory."

Answer:

<blank>Yukon</blank> is Canada's westernmost territory.