What does Salem mean?

Reread this paragraph from the passage. at the lab, jim finally felt like he was doing something to . after long days of work, when the scientists went to sleep for a few short hours, jim scrubbed the equipment and got it ready for the next day. he frequently traveled through the tunnels back to his old home to collect airdropped food. how does the narrator use the setting of the lab to develop jim's character in this section? write your answer on the lines below