Answer:
"killed tens of thousands of people".
Step-by-step explanation:
The phrase that best completes the graphic organizer to show the effects of atomic bombs used during World War II is "killed tens of thousands of people". The atomic bombings of Hiroshima and Nagasaki killed between 129,000 and 226,000 people, most of whom were civilians. The bombings ended World War II, and while they brought death and destruction, they averted even greater losses. President Truman authorized the use of the atomic bombs in an effort to bring about Japan's surrender.