Final answer:
Canada's primary agricultural activities are concentrated in the St. Lawrence River region and the southern Prairie Provinces, which are known for their fertile farms, grain, and beef production.
Step-by-step explanation:
Canada's chief area of agricultural activity is located in the St. Lawrence River region and the southern Prairie Provinces of Manitoba, Saskatchewan, and Alberta. This region is characterized by fertile farmlands and is critical for the production of various agricultural products, including grains and beef. The St. Lawrence River area is known for dairy farms and crops that supply food to the nearby cities, while Ontario has fertile farmland around the Great Lakes. The Prairie Provinces feature extensive grain farms and cattle operations, benefiting from the Ogallala Aquifer for irrigation in some parts and adapting to the arid conditions with center pivot irrigation systems.