Which of the following are biodegradable?

The correct answer indicates that cotton is biodegradable. Biodegradable materials are substances that can be broken down by natural biological processes, typically by microorganisms like bacteria and fungi. Cotton, being a natural fiber derived from the cotton plant, consists of organic material that decomposes easily in the environment.

This process contributes to reducing waste and supports environmental sustainability, as cotton can break down into harmless substances that enrich the soil rather than contributing to pollution.

Wood also qualifies as biodegradable because it is made from plant material, which can decompose, although the rate can depend on the type of wood and environmental conditions. Paper is similarly biodegradable, as it is made from processed plant fibers, but it may contain inks and chemicals that can affect its breakdown in the environment.

The option indicating "none of the above" does not apply because both cotton and the other materials listed (wood and paper) possess biodegradable properties. Therefore, cotton stands out as a specific example of biodegradable material, particularly relevant in discussions about sustainable products and waste management.