Is it possible that a distinct lower-class culture exists? do you know anyone who has the focal concerns miller talks about? were there "focal concerns" in your high school or college experience?

1. Yes, it is very possible.
Lower class culture refers to a set of behavioral expectations that imposed to a certain group that eventually become a barrier for their success.
For example, many parents from poor neighborhood tend to discourage their children to obtain higher education because they internally believe that their children wouldn't be able to compete with children from middle-higher economic background.

2. Yes , I do.
There is  a friend of mine in high school that come from a family of a single mother that somehow has to raise 4 children on her own.
Even though i could see how hard it could be for her, i still feel a sense of disagreement of the fact that she encouraged my friend to take a 8 hour shift after school to help the family in meeting ends meet because i believe it would became a huge obstacle for my friend to pursue college education

The changes to agriculture in the united states since 1900 is that increased mechanization has increased food production, thereby increasing the need for labor. there has been an increased need for higher speeds of food production due the fact that the population in the united states continues to rise.

It is written in the constitution saying all beliefs are allowed in the u.s. justice will be surved to everyone no matter what the color of that person is. and that all people are equal not matter there color is the u.s. that was a lie though because black people were still treated poorly, and there were places that was white people only such as hospitals, schools, bathroom, and more.