What are some ways in which laws have been used to enforce discrimination?

Making discrimination a legal thing.

Explanation:

Laws that enforce discrimination are based in prejudices about race, gender, nationality or religion. These laws make discrimination a legal thing.

One of the ways laws were used to enforce discrimination were through the establishment of segregation laws, which stated the separation of black and white people from schools, public places and trains.

For example, Jim Crow Laws, such as from Alabama, 1930. It stated “It shall be unlawful for a negro and white person to play together or in company with each other in any game of cards or dice, dominoes or checkers.”