Final answer:
President Reagan defied the nuclear freeze movement by increasing defense spending, improving relations with the Soviet Union, and negotiating treaties to reduce nuclear weapons.
Step-by-step explanation:
President Reagan defied the nuclear freeze movement during the early 1980s through his policies and negotiations with the Soviet Union. He increased defense spending and sought to improve relations with the Soviets. He negotiated a treaty with Soviet leader Mikhail Gorbachev that aimed to eliminate intermediate-range nuclear missiles, and they later signed the Intermediate-Range Nuclear Forces (INF) Treaty to eliminate a whole category of nuclear weapons. These actions demonstrated Reagan's commitment to national security and reducing the risk of nuclear conflict.