Answer:
New towns popped up to support the large number of people that migrated to the territory to search for gold.
Explanation:
There wa a mass exodus of prospecting migrants from their hometowns to Canadian Yukon Territory and Alaska after gold was discovered there in 1896. The idea of striking it rich led over 100,000 people from all walks of life to abandon their homes and embark on an extended, life-threatening journey across treacherous, icy valleys and harrowing rocky terrain. Many people didn't make it but still towns were needed to support the ones that did.
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