Question

saving the apollo 13 mission
on april 11, 1970, apollo 13 was launched for a planned moon landing. two days into the mission, however, one of the oxygen tanks in the spacecraft exploded, causing a loss of air, electricity, and water. the moon landing had to be canceled, and the astronauts had to figure out how to get home. their solution was to move into the lunar module, the small craft that was supposed to land on the moon, for much of the remaining trip. the lunar module contained fewer supplies, however. therefore, the astronauts had to conserve as much food and water as possible. by firing the lunar modules engine, the men were able to get the spacecraft on the correct course to return to earth. on april 17, apollo 13 landed safely in the pacific ocean.
what is the main, or central, idea of the passage?
after an explosion on apollo 13, the astronauts had to conserve supplies.
after an explosion on apollo 13, the spaceship began to lose air, water, and power.
after an explosion on apollo 13, the astronauts took shelter in the lunar module.

Explanation:

The passage details the Apollo 13 mission, starting with its launch, the explosion - related issues, and the actions taken to return safely. The key is that after the explosion, the astronauts had to take multiple steps to return home, and all the actions were part of the overall effort to save the mission.

Answer:

None of the provided options fully capture the central idea. The main idea is that after an explosion on Apollo 13, the astronauts took various measures to return safely to Earth, including using the lunar module, conserving supplies, and correcting the spacecraft's course.