Final answer:
Jim Crow laws were the segregation laws that enforced racial boundaries between whites and blacks in the U.S. South across various aspects of life. They were legally upheld by the Plessy v. Ferguson case until the Brown v. Board of Education case declared de jure segregation unconstitutional.
Step-by-step explanation:
Segregation laws that legally enforced the boundaries between whites and blacks in various aspects of life such as housing, education, voting rights, and access to public services are called Jim Crow laws. These laws were prevalent in the U.S. South and were upheld by the Supreme Court's decision in Plessy v. Ferguson in 1896, which established the doctrine of 'separate but equal'. It wasn't until the Brown v. Board of Education case in 1954 that de jure segregation was declared unconstitutional.
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