Final answer:
Protection from threats or violence for supporting open housing rights is provided by the Fair Housing Act of 1968, which specifically aims to eliminate discrimination in housing.
Step-by-step explanation:
Protection from threats or acts of violence against those who assist and encourage open housing rights is found in a) The Fair Housing Act. The Fair Housing Act of 1968, also known as Title VIII of the Civil Rights Act of 1968, specifically banned discrimination in the sale, rental, and financing of dwellings based on race, color, religion, sex, or national origin. Additionally, it provides protection for those who are assisting others in exercising their fair housing rights.
While the Civil Rights Act of 1964 was instrumental in ending segregation and protecting civil rights in other sectors such as employment and public accommodations, it did not specifically address housing discrimination. The Equal Housing Opportunity Act is another term often used to refer to the Fair Housing Act, as it embodies the principle of equal opportunity in housing. The Universal Declaration of Human Rights, on the other hand, is an international document that sets out basic human rights but does not specifically address U.S. housing law.