If this question has the same quote as the ones posted before, then the answer would be the second option which is: atomic bomb dropped on Nagasaki.
> The bombings in Hiroshima and Nagasaki happened on the 6th day of August in 1945 during the WWII that falls in the years 1939-1945. It was an American B-29 bomber, the world's first atomic bomb, deployed over the Japan's City, Hiroshima. Three days after, a second B-29 dropped another A-bomb on Nagasaki, killing roughly, 40,000 people.
As a consequence to the bombings, Japan’s Emperor, Hirohito announced his country’s unconditional retreat in World War II over a radio, addressed on the 15th of August.