The correct option is B Biodegradable waste
Biodegradable wastes are the organic wastes like manure, sewage, kitchen waste, agricultural waste etc. These wastes can be broken down into simpler forms with the help of microbes. For example, composting is a method which is based on the degradation of biodegradable wastes. In this method, organic materials are decomposed into nutrients rich materials called compost, which is a good fertiliser for plants. So, the correct option is B.