How does Lorraine Hansberry bring out the theme of discrimination in the play "A Raisin in the Sun"? word limit-1200

The most shining example of discrimination in A Raisin in the Sun is when the white homeowners of the Clybourne Park Improvement Association, the neighborhood the Younger family is planning to move to, attempt to pay them to give up the home they've purchased so that the neighborhood stays white. This makes discrimination a real issue that the protagonists have to confront to grow as people and as a family unit.
Karl Lindner, who represents the Association, suggests that the family takes the money for their house and move to a new neighborhood where there are more black people living. The neighborhood where Lena purchased the house is a neighborhood with only white people; Karl doesn't think it would be good for his neighborhood or the Younger family to move there. His offer means that they could buy another house elsewhere and the family does consider taking it—especially when Walter loses the rest of the inheritance.
Ultimately, it's clear that the Younger family will face even more prejudice when they move into the neighborhood. They know that the people there aren't going to welcome them. However, they decide to go through with it anyway. With the rest of the money gone, it's the best way to pay tribute to their deceased husband and father. It's also the best hope they have for getting out of the ghetto and finding a better life.