Why are the provinces of Ontario and Quebec the most populated? Both provinces have a humid continental climate in the south. Both provinces have cold winters and mild summers. The Canadian Shield provides farmland to the area. The southern edge of the two provinces have a booming fishing industry,

The answer is d. none  hope this .

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When a lake, river or other aquatic  system  becomes  eutrophic, it can have serious negative effects on other organisms like fish, birds and even people.if an algal bloom is so bad that it causes wide-spread death  in  the  water, the organisms that die will all sink to the bottom and start to decompose.