They remained focus on farming and trading
The story of Andrew Carnegie is an example of an extreme case of Philanthropic Acts. He was a Scottish-American industrialist that paved the way for the expansion of the American steel industry during the 19th century. He gave almost 90% of his fortune to charities, foundations, and universities because he believed the wealth is something to be used for the improvement not only of himself but of society.
This is an example of spontaneous recovery.
There was no reason for Mia to stop sleeping when the light was turned off, but it happened. Similarly, even though there was no reason for her to manage to sleep with the lights off again, it happened as well. It was spontaneous, meaning that she didn't have to learn it all over again - it just happened.
The Federal use of open market operations affects banks' money available to lend.
The Federal Reserve uses open market operations as a way to control the money that the banks will operate with. When the reserve needs to be increased the Federal Reserve buys more instruments, and they sell them in order to decrease it.
