The correct option is B Burying plastic waste
An eco-friendly or environmentally friendly act is one which does not cause any direct or indirect harm to the environment. Reforestation helps in increase the forest cover which supports a variety of flora and fauna. Segregated waste disposal helps in minimising the waste disposal by identifying reusable or recyclable things. Biodegradable materials do not cause any harm to the environment, as they can be easily disintegrated by the earth with time. But, burying or burning plastic is harmful to the environment as it releases toxic substances.