Final answer:
Arthur Ashe addressed the UN General Assembly in 1985, advocating against apartheid in South Africa.
Step-by-step explanation:
Arthur Ashe addressed the UN General Assembly in 1985. He was an advocate for human rights and used this opportunity to speak out against the apartheid system in South Africa. This speech was part of Ashe's broader effort to raise awareness and support for the end of racial discrimination and oppression in that country.