A black and white photograph shows two men working on an early car frame in a line of cars.
Use the image to answer the question.
Which innovation does the photograph illustrate?
a. labor strike
b. power plant
c. Bessemer process
d. assembly line
d. assembly line
The photograph shows the two men working on an early car frame in a line of cars, indicating that they are part of an assembly line process where each worker has a specific task in the creation of the car.