Answer:
The crust is the layer that you live on, and it is the most widely studied and understood. The mantle is much hotter and has the ability to flow.
Explanation:
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Here's a link that hopefully helps you:
https://www.smithsonianmag.com/smart-news/five-things-know-about-declaration-sentiments-180959352/
D) there was a great diversity of skill and cultures in the labor force didn't you forget how AMerica's economy made a diversity.