Assertion [A]: Organic farming is becoming increasingly popular as if protects the environment. This is true. Organic farming practices reduce the use of synthetic pesticides and fertilizers, protect soil health, reduce water pollution, and promote biodiversity, all of which contribute to environmental protection. This environmental benefit is a key reason for its growing popularity. Reason [R]: Organic farming based agricultural system that uses ecologically based pest controls and biological fertilisers derived from animal waste and nitrogen fixing cover crops. This is a correct description of the core practices of organic farming. It relies on natural processes and materials rather than synthetic inputs. Relationship: The methods described in Reason [R] (using ecological pest controls, biological fertilizers, etc.) are the specific practices that lead to the environmental protection mentioned in Assertion [A]. Therefore, [R] correctly explains why [A] is true.