Why did the U.S. use the atomic bombs against Japan? all are correct to end the war faster to save American lives to avoid an invasion of Japan

The U.S. used the atomic bombs against Japan for several reasons. Firstly, it was believed that the bombings would bring a swift end to the war, avoiding the need for a prolonged and bloody invasion of Japan. Secondly, the bombings were seen as a way to save American lives, as an invasion of Japan would have resulted in significant casualties on both sides. Lastly, the bombings were also intended to demonstrate the power of the atomic bomb and to send a message to other countries, particularly the Soviet Union, about the U.S.'s military capabilities.