<span>The rising and falling of the tides so the wells would become salty because of the tides coming in.</span>
The railroads help transfer people and goods across the United States lot faster than on horse. Also helped with mailing.
This is based off of what YOU would think, so I can not write an answer and you get an A, but I can guide you. To answer “What is a Hero” can take many shapes or forms. Some could say Iron Man, or Batman, or it could be someone who has greatly impacted your life. Think about it. If you need anymore help I can try to guide you more! Have a pleasant day!