An example of was the jim crow laws, which legalized the separation of the races in public accommodations (such as hotels, restaurants, transportation, hospitals, jails, schools, churches, and cemeteries) in the southern united states after the civil war.

The correct answer here would be de jure segregation.

Jim Crow laws are a perfect example of the de jure segregation as they legalized the separation of races and de jure segregation refers especially to the laws that systematically enforced (and they were enforced harshly) both social and physical separation of African Americans. This referred to all aspects of public life.

The answer will be a