Why was the introduction of the assembly line crucial to the success of the model t?

the assembly line allowed Henry Ford to keep dropping worker's wages

workers of lowell mills were greatly benefited for the waltham type of work which was more a paternalist kind, trying to protect the integrity of this little girls coming from small farmers and providing an adequate place of work, this in an effort to avoid the issues of bad place conditions and immorality that the people in bigger industrialized cities of great britain were experimenting.

answer; i believe that the correct answer is (tobacco);