What the answer to this question by explain it

First off the railroads allowed people to be transported from one city to another in half the time from them walking. This allowed families to see each other and friends to visit. However one problem was how African Americans were treated they were sat in different train cars because of their skin color making a huge drift between whites and African Americans. Nature was affected because trees had to be removed to build the railroads and many forests suffered because of this. Not to mention the smoke from the trains which would pollute the air. Hope this helps.

Explanation:

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native american contribution: the patriots from britain learn how to hunt, fish, and introduce diversity within cultures.

african americans: indirectly introduced the idea of diversity to americans. africans coming to america because of slavery taught white americans that people come from different backgrounds and colors. it also built america's economic stability for a great period of time. 

women: make america what it is today. there are some societies that are in the world currently that do not give women the same right we give women here in the united states. because women have rights here in the united states, other countries' citizens strive to come to america, especially women, since they have equal rights in the united states. this is important because america is seen and desired by many in the world. 

children: children are our future. we learn from our elders and carry out things the same or differently learning from america's history. we continue tradition and change tradition if it is needed.