Because the cause and effect set off the story or really whatever your writing
Positive:
The founding of North America
Acquiring of wealth and natural resources
Negative:
The colonialism of Spain and Britain (From native's pov)
Slavery of natives
Led to the Atlantic Slave Trade
Arguably led to the Scramble for Africa
The answers are b.water scarcity and then d. dust storms . this is because it is very dry and lacks water x
Taiwan became important because an exile government of China was formed there that claimed to be the rightful government of China. This caused China to have two governments, one that ruled China which was the communist one and one in exile which claimed their right to have power over China but couldn't actually use that power in any way. The problem still exists today and other countries have mostly been neutral on this question.
