In the context of India, which of the following is/are considered to be practice(s) of eco-friendly agriculture? 1. Crop diversification 2. Legume intensification 3. Tensiometer use 4. Vertical farming. Select the correct answer using the code given below:

1. Crop diversification — It reduces monoculture, improves resilience, and can lower pest and nutrient stress. Verdict: Correct.

2. Legume intensification — Legumes enrich soil nitrogen biologically and reduce dependence on chemical fertilizers. Verdict: Correct.

3. Tensiometer use — It helps schedule irrigation based on soil moisture tension, improving water-use efficiency. Verdict: Correct.

4. Vertical farming — Though high-tech, it is treated as eco-friendly because it uses less land, can save water, and may reduce pesticide use under controlled conditions. Verdict: Correct.

Hence, 1, 2, 3 and 4 are considered eco-friendly agriculture practices.