Answer:
a. The degree to which a job requires completion of a whole and identifiable piece of work
Explanation:
According to job characteristics model, what motivates an employee to be productive is the task he or she is asked to perform. Ideally, when a task is somewhat challenging, such would motivate the worker to exert his or her energy hence perform well on the task whereas a non challenging task wears down an employee's performance.
The model states that there are five core job characteristics that would show how a job is likely to affect the behaviors and attitude of employees. They are task identity, task variety, feedback, autonomy and task significance.
Therefore, according to the model, task identity is the degree to which a job requires completion of a whole and identifiable piece of work.