Agriculture

We need to identify the type of agriculture where citrus fruit production is the main feature.

Step 1: Understand the characteristics of different agricultural types.
- Plantation Agriculture: Large-scale farming of cash crops like tea, coffee, rubber, sugarcane, bananas, etc., typically in tropical regions.
- Mixed Agriculture: Farming that involves both crop cultivation and livestock rearing.
- Mediterranean Agriculture: Practiced in regions with Mediterranean climate (warm, dry summers and mild, wet winters). It specializes in horticulture and the cultivation of citrus fruits (oranges, lemons, etc.), olives, grapes, and other fruits.

Step 2: Identify the agriculture type associated with citrus fruits.
Citrus fruits like oranges, lemons, and grapefruits thrive in Mediterranean climatic conditions. Countries like Spain, Italy, Greece, California (USA), and South Africa are known for Mediterranean agriculture where citrus fruit production is a dominant feature.

Step 3: Evaluate each option.
- (A) Plantation — Incorrect. Plantation agriculture focuses on tropical cash crops like tea, coffee, and rubber, not typically citrus fruits.
- (B) Mixed — Incorrect. Mixed farming involves both crops and livestock, but citrus fruits are not its main feature.
- (C) Mediterranean — Correct. Mediterranean agriculture is specifically known for citrus fruit cultivation.
- (D) None of these — Incorrect since option (C) is correct.

Step 4: Conclusion.
Citrus fruit production is the main feature of Mediterranean agriculture.
Final Answer: (C) Mediterranean