Answer: Job enlargement
Explanation: Each worker performs just one task previously which was increased subsequently with each worker performing more than one task. This illustrates job enlargement which is an horizontal expansion (expansion at the same level of skill or responsibility) of a job description wherein more and more tasks, duties and responsibilities are added to the job in order to make the job more challenging.
Job enlargement offers some advantages such as an increase in skill variety, improvement in earning capacity, and so on.
