What process allows each worker to perform just one step in the manufacturing process?

The assembly line is a manufacturing process that revolutionized production during the Industrial Revolution by breaking down the production of goods into distinct steps. Each worker is assigned a specific task, which often involves repetitive actions focused on a single step of the overall process. This specialization allows for increased efficiency and speed, as workers become adept at their specific tasks, resulting in faster production times and lower costs.

In contrast, mass production encompasses a broader concept of producing large quantities of goods, which may include various methods such as assembly lines, but does not solely refer to the division of labor among workers. Batch production involves producing goods in groups or batches, which may require various workers to switch between different tasks rather than specializing in only one. Sequential production typically refers to a process where tasks are completed in a specific order but does not emphasize the specialization of individual workers to a single step as the assembly line does.

Thus, the assembly line is distinctly defined by the allocation of specific steps to individual workers, making it the correct choice in this context.