Answer:
it improved science and research
Explanation:
americans come up with many ways be it scientist to bring down it's enemies this improved science and research
B one that stretched from coast to coast
Hudson Champlain Menendez Minuit
Answer:
By them moving to the frontier, they were advertising how they wanted to move there. They would show people the amazing aspects of the rest of the country, inspiring them to move there as well.
Steam-powered ships were ran by steam and sailboats were ran by the wind.
