The correct answer is option 2, Hiroshima. During World War II, the United States dropped the first atomic bomb on the city of Hiroshima in Japan. This decision was made as a strategic attempt to end the war quickly and avoid further casualties on both sides. The bomb, named "Little Boy," was dropped by an American B-29 bomber named Enola Gay on August 6, 1945. The explosion instantly killed an estimated 70,000-80,000 people, with many more dying due to radiation sickness in the following months and years. The bombing of Hiroshima was a significant event in history, leading to the surrender of Japan and the end of World War II.