Its to communicate with the enslaved people who are going to leave with her :)
This line is foreshadowing because it implies that anything -- even people -- that becomes a burden can easily be destroyed.
Later, when Beatty himself becomes a problem, Montag burns Beatty to death. When Montag killed Beatty, he destroyed the responsibility he owed him. In this way, this line is an element of foreshadowing.
Hi ^-^
It helps by giving them a nice place to stay and study, the more you study the smarter you'll be so it can help by making you smarter. The social part gets your social skills better and prepares you for business meetings and stuff like that.
Hope this helps and please mark as brainliest!