PLEASE HELP ANSWE THESE ONLY ANSWER 1-4

Who were the first humans to inhabit the americas?

Describe the relations between the united states and other countries under the articles of confederation. 3-4 sentences

23. how does specialization among nations encourage interdependence? nations work together to share labor and resources to produce vital goods. nations sign treaties prohibiting taxes on imports. nations produce specific goods and then trade to obtain things they need. nations that are more developed agree to fund development in nations with limited industry.