Workers who own and operate an enterprise to earn their livelihood are known as:

The correct option is Self-employed.

Explanation

The classification of the workforce in an economy is primarily based on the nature of the employment relationship between the worker and the enterprise.

Analysis of Employment Categories:

• Self-employed: These are workers who own and operate an enterprise to earn their livelihood. They possess the resources (land, capital, or skills) required for production and bear the risks associated with the business. Examples include farmers, shopkeepers, and independent professionals. This category constitutes a major portion of the workforce in India.
• Regular Salaried Employees: These workers are engaged by an enterprise or an employer on a regular basis and receive periodic wages or salaries. They typically have job security and social security benefits.
• Casual Wage Labourers: These workers are casually engaged in others' enterprises and receive remuneration for the work done. They do not have regular income, job security, or social security benefits (e.g., construction workers).

Key Takeaway:

The primary distinction in employment types lies in the ownership of the enterprise; self-employed individuals own the means of production and the enterprise, whereas wage labourers and salaried employees work for an employer.