Concept:Organising productive factors like land, labour, and capital into a working business is the key role of an entrepreneur.
Explanation:An entrepreneur sets up a business and combines all resources.
They organise the factors of production to produce goods and services.
They also take the financial risk of running the enterprise.
Management and the production manager only supervise daily operations.
A labour union protects workers, not the organisation of factors.
Thus, the entrepreneur is responsible for organising productive factors.
Answer:The correct option is B. entrepreneur.