Plastics are human-made polymers and are non-biodegradable which means they cannot be easily handled and cannot be decomposed or dissolved by natural agents like microbes (e.g. bacteria, fungi), abiotic elements like temperature, UV, oxygen, etc. Thus are not eco-friendly. Option B is correct
The plastics are the non-biodegradable wastes because they are synthetic polymers which cannot be acted upon by the microbes. They cannot be degraded by the decomposition activity of the bacteria and fungi. The cotton, paper and leftover food are degradable.