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.
I don't get it either maybe try google just trying to help
They can work hard to achieve the goal or do the action. Some people may in this way if they are under great deals of stress. They may lash out on people around them. By how they act to a subject.
