Final answer:
The population densities found in southern Ontario are amongst the highest in Canada. Southern Ontario has some of the highest population densities in Canada, largely due to being home to the largest concentration of Canadians and its location near the US border.
Step-by-step explanation:
The population densities found in southern Ontario are amongst the highest in Canada. This is because Ontario, particularly the southern part, has the largest concentration of Canadians. The region is often called South Canada due to its high population and proximity to the United States border.
Ontario accounts for about 39 percent of the entire Canadian population, which is the largest share when compared to all other provinces in Canada. The importance of this area for the nation's demographic and economic activity cannot be overstated.