Final answer:
The Prairie provinces of Canada, particularly Alberta, are known for their fertile agricultural land and valuable energy resources such as oil found in tar sands.
Step-by-step explanation:
The region of Canada known for both its fertile agricultural land and valuable energy resources is the Prairie provinces. These provinces, which include Manitoba, Saskatchewan, and Alberta, offer a wealth of natural resources. Fertile farmland in this region supports large grain and beef operations while Alberta, in particular, is central to Canada's fossil fuel exploration. Alberta is known for its abundant reserves of coal, oil, and natural gas, with oil being extracted from tar sands for energy.