Final answer:
Departmentalization is the process of grouping jobs and employees into departments based on the tasks they perform or the skills they possess.
Step-by-step explanation:
The correct answer to the question "On what basis are jobs grouped together?" is A) Departmentalization. Departmentalization is the process of grouping jobs and employees into departments based on the tasks they perform or the skills they possess. It helps to organize work and allocate resources more effectively.