Transfer payments as non-productive income

Steps:

• Identify the key: Income without output contribution means no production involved.
• Recall definitions: Profits, salaries, and revenues tie to economic output; transfer payments do not.
• Match to choices: Eliminate A, B, C as they involve production; D fits non-productive transfers.
• Confirm: Transfer payments like welfare redistribute existing income without new output.

Why D is correct:

• Transfer payments are government or social redistributions (e.g., unemployment benefits) that provide income without requiring recipient contribution to goods/services production, per economic definitions.

Why the others are wrong:

• A. Profit arises from business output and sales, directly contributing to economic production.
• B. Salary compensates labor input, which produces goods or services.
• C. Revenue comes from selling output, linking directly to production value.

Final answer: D