What do Canada and the US share, as mentioned by Michael Buma?

The correct choice highlights the concept of continental monoculture, which refers to the agricultural practice of growing a single crop or plant variety over a large area. In the context of Canada and the United States, this relationship underscores the interconnectedness of agricultural practices and the economic reliance between the two countries.

Canada and the US share vast land areas that are ecologically conducive to certain types of large-scale monoculture. This phenomenon is particularly prominent in regions like the Midwest of the United States and the Prairie provinces of Canada, where crops such as corn, soybeans, and wheat dominate the agricultural landscape. The economies of both nations benefit from these agricultural practices, influencing trade policies, food supply chains, and rural economies.

While the other choices present valid aspects of the relationship between Canada and the US, they do not encapsulate this specific agricultural and economic characteristic. For instance, shared natural resources do exist, but they do not specifically address the monoculture aspect. Similarly, cultural diversity and economic prosperity are important themes but do not relate directly to the agricultural practices discussed in this context.