On August 9, 1945, the second atomic bomb was released on which city?

The correct choice is Nagasaki. On August 9, 1945, the United States dropped the second atomic bomb, known as "Fat Man," on Nagasaki, Japan, during World War II. This action followed the earlier bombing of Hiroshima on August 6, 1945. The bombing of Nagasaki was significant as it contributed to Japan's eventual surrender, marking a pivotal moment in the war. This also represents a historical event that highlighted the devastating power of nuclear weapons and escalated discussions around military ethics and warfare.

The other cities listed, such as Hiroshima, Fukuoka, and Osaka, were not the target of the second atomic bomb; Hiroshima is well-known for being the site of the first atomic bomb. Fukuoka and Osaka were not involved in the atomic bombings during this period.