Answer:
Formal organisations: These organisations are structured, bureaucratic entities that are established to achieve specific goals or objectives. They are often large and complex, and they have a clearly defined hierarchy of authority.
Informal organisations: These organisations are not as structured as formal organisations and are often formed spontaneously. They are typically less complex and have fewer rules and procedures.
Voluntary organisations: These organizations are formed by individuals who come together voluntarily to achieve a specific purpose or goal.
Step-by-step explanation: