Which american inventor is best know for his use of the assembly line for mass production in the automobile industry?

Henry Ford.

Explanation:

Henry Ford  (1867-1947) is one the greatest tycoons of the US automobile industry. He had a vision and knew how to make it happen. He was the first industrialist who extensively used the assembly line in the mass production of cars; it turned into the standard production method from phonographs to hamburgers. But what probably allowed his extraordinary success was the business idea of fabricating a car for the masses, a car that could be bought and driven by common people, not only by rich people. That idea is simply grandiose and inspiring.

b. parliament was weaker than the monarchy.