Which of the following is true about the Yukon Territories?

The Yukon Territories is indeed widely known for its gold rush history, particularly the Klondike Gold Rush that occurred during the late 19th century. This historical event led to a massive influx of prospectors and settlers in search of fortune, significantly impacting the region's development and culture. The gold rush not only transformed the economy of the Yukon but is also a crucial part of Canadian history, marking a period of rapid growth and change.

While the other options contain information that may relate to Canada or other territories, they do not accurately describe the Yukon Territories. It is not the most populous province; it does not have a temperate climate year-round, as it experiences cold winters and short summers; and it is not located in eastern Canada but rather in the northwest, adjacent to Alaska. Recognizing the significance of the gold rush in the Yukon helps to understand its historical importance and its lasting legacy in Canadian culture.