Answer:
Senior management, middle management and operational management.
Explanation:
Hierachy can be described as a method of structuring an organisation into various level from the top to the bottom, with each level having their defined role and authority in the organisation.
Senior management is the highest level in an organisation, they are responsible for supervising and controlling the daily activities that goes on in the company. They are known as the top decision makers.
Middle management is below the senior management, they are not responsible for decision making but are assigned to control the activities of the workers, they also help to inspire and motivate the workers inorder to increase productivity.
Operational management is directly responsible for the production of goods and services, they control the available materials which is needed to manufacture goods.