A system of co-operative activities of two or more persons is called __________.

department
co-ordination
organization
control

The correct answer is: C. organization.

An organization is a system of cooperative activities of two or more persons. It is a group of people who work together to achieve a common goal. Organizations can be formal or informal, and they can be large or small.

A department is a part of an organization that is responsible for a specific task or set of tasks. Departments are often organized by function, such as marketing, sales, or finance.

Co-ordination is the process of ensuring that the activities of different parts of an organization are working together effectively. Co-ordination is important for ensuring that the organization achieves its goals.

Control is the process of ensuring that the activities of an organization are carried out in accordance with its plans and objectives. Control is important for ensuring that the organization is efficient and effective.

I hope this helps!