Which one of the following agricultural practices is eco-friendly?

1. The question asks to identify the most eco-friendly agricultural practice among the given options. 2. Organic farming minimizes the use of synthetic fertilizers, pesticides, and genetically modified organisms, relying instead on natural processes, biodiversity, and cycles adapted to local conditions. This makes it environmentally sustainable. 3. Shifting cultivation involves clearing forests for temporary cultivation, leading to deforestation and soil degradation. 4. Cultivation of high yielding varieties often requires intensive use of chemical fertilizers and pesticides, which can harm the environment. 5. Growing plants in glass-houses can be energy-intensive and may not be inherently eco-friendly depending on the resources used. 6. Therefore, organic farming is considered the most eco-friendly practice.