Which of the following analogies best describes the organization of nerves?

Question $26$ options:

Nerves are like factories with assembly lines $($neurons$).$ The assembly lines produce materials to leave the factory as well as enter the factory.

Nerves are like the post office. Nerves are where all the "packages" $($information$)$ arrives and is processed.

Nerves are like highways with one$-$way streets entering and exiting a neighborhood. Some neurons travel into the neighborhood only, while others travel out of the neighborhood only.