All of these men reacted to the newly minted wealth of the United States in different ways, however Carnegie was the most pronounced in the way he seized much of it for industry. Washington, on the other hand spread awareness.
Answer:
Tubman decided to help the Union Army because she wanted freedom for all of the people who were forced into slavery, not just the few she could help on the Underground Railroad. And she convinced many other brave African Americans to join her as spies—even at the risk of being hanged if they were caught.

Because, They don't have another money, or people doesn't really care about them. The poor have struggles to have medical attention how they life style is like. It's hard for them to get enough medical attention, and, that's why sometimes people need to donation some money that the poor can get food, fresh water, medicine they need. Sometimes when people try to help Mother Nature comes in.. and, ruin everything. Soooo... yeah.
Hopefully, this helps you!!
