Final answer:
The Prairie provinces of Manitoba, Saskatchewan, and Alberta are renowned for their fertile agricultural land and rich energy resources, including coal, oil, and natural gas.
Step-by-step explanation:
The region of Canada known for both its fertile agricultural land and valuable energy resources is the Prairie provinces, which consist of Manitoba, Saskatchewan, and Alberta. These provinces contain some of Canada's best farmland, ideal for large grain and beef operations, and are also rich in fossil fuel resources, particularly in Alberta. Coal, oil, and natural gas are found in abundance within the Prairie provinces, with the oil being extracted from tar sands, a notable characteristic for this region's energy sector.