Which Apollo 11 spacecraft part housed all three astronauts?

Which Apollo 11 spacecraft part housed all three astronauts? The command module housed all three.

Apollo 11’s command module, named Columbia, was the crew cabin that housed Neil Armstrong, Buzz Aldrin, and Michael Collins during launch, the journey to the Moon, and the return to Earth. It was the only major Apollo spacecraft component designed to bring the entire crew back through the atmosphere and splash down safely.

The command module was part of the combined command and service module. The service module supplied propulsion, electricity, oxygen, water, and other consumables, but it was not the crew’s living compartment. It was discarded before reentry and burned up in the atmosphere.

The lunar module, named Eagle, carried Armstrong and Aldrin from lunar orbit to the surface and back, while Collins remained aboard Columbia in lunar orbit. The Saturn V’s S-IVB was a launch-vehicle stage, not part of the crew cabin. Columbia returned to Earth on July 24, 1969, and is now preserved at the Smithsonian’s National Air and Space Museum.