Canada has a lot of natural resources -this is one of the reasons why it's in such a strong position. Another reason why it's so strong is that it has ports on both the Atlantic Coast and the Pacific coast - so it can trade with both Europe, Africa and Asia.
The development of ozone, oxygen, and cyanobacteria factored in the development of complex organisms. The cyanobacteria or also called blue-green algae are microbes use the sunshine, water and carbon dioxide to conduct photosynthesis and produce carbohydrates oxygen.
This great oxidation event changed the Earth and life on Earth forever.
C. Few valuable natural resources