What physical features would attract more people to East China?

 While the vast cities and technological feats of the modern China are easy to marvel at, some of China's most awe-inspiring features are found outside the city limits. Mountains, deserts, rivers, beaches, deep canyons and fertile plains all make up China's unique and storied geography.

Explanation:

the answer is a glaciers carved a large valley that later flooded and became puget sound

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