Concept:Internal environment includes factors and people inside the business organisation.
Explanation:The internal environment consists of elements within the organisation.
These include employees, managers, owners, and the corporate culture.
Employees are part of the organisation itself and directly affect its day-to-day working.
Suppliers, creditors, and customers belong to the external environment.
They are outside the business and interact with it from the outside.
Therefore, the person who is part of the internal environment is an employee.
Answer:A. employee