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Dude is it not written there in your book?
Answer:
<h3>The Neolithic Revolution had a big impact on humans. It allowed people to stay in one place, which meant they were able to farm, cultivate crops, and domesticate animals for their own use. It also allowed humans to develop a system of irrigation, a calendar, plows, and metal tools</h3>
The American resources that were the most important to the Spanish were gold and silver, while for the French it was the furs that they traded. England found great profit in the tobacco trade.
This site may help you:
https://quizlet.com/58430275/71-the-us-enters-wwi-flash-cards/
to save you from googling i believe the answer to your question is:
In<span> 1917 the </span>use of unrestricted German submarine warfare<span> caused the U.S. </span>to<span>enter the </span>war<span> on the side of the Allies. </span>How did Germany's use of unrestricted submarines warfare bring<span> the </span>United States into<span> WWI ? A </span>German U-boat<span> had sunk the British passenger ship the Lusitania </span>at<span> great loss of life.
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just know that if you are homeschooled like i am, quizlet iqll most likely have the answers to your questions, hope i helped you :)