What is the definition for the term airlock? Refer to section six of the text.

A.)Airlocks are devices used to send humans deeper into
space than ever before.

B.)An airlock turns sunlight into electricity by using solar panels to capture sunlight in an air tight space.

B.)An airlock is a small area with air pressure used to
balance the pressure between space and the air in the space station.

D.) Airlocks occur in plumbing systems when pockets of
air in a pipe trap the water in the pipe, not allowing the water to flow freely through the pipe.​