Explanation:

- Option 1: Modern farming

- Uses chemical fertilizers, pesticides, and technology.

- Focuses on high productivity.

- Option 2: Zero farming

- Not a commonly recognized term in agriculture.

- Option 3: Mixed farming

- Combines crops and livestock on the same farm.

- Provides income diversification.

- Option 4: Organic farming

- Utilizes organic wastes and biological materials.

- Uses beneficial microbes to keep soil healthy.

- Avoids synthetic chemicals.

- Option 5: Alley farming

- Involves planting crops between rows of trees.

- Enhances soil fertility with organic matter.