Trees, coral and animals called living fossils.
OK so the best choice to pick from will be C because it is *Regional* not Global ^_^ and they really have no connection to each other.<span />
If population size temporarily exceeds the environmental carrying capacity, deaths will increase until the population size returns to previous levels.
Freshwater is not as common through history. Most oceans on earth are salty, the Great Lakes being an exception. Over time freshwater has been used constantly by humans and declines, their are still tons in the
Various water-tables. Hope that helps