What defines a substance that can be decomposed by bacteria or living things?

A substance that can be decomposed by bacteria or living organisms is defined as biodegradable. The term "biodegradable" refers specifically to materials that can be broken down by natural biological processes, typically involving microorganisms such as bacteria, fungi, and other decomposers. This decomposition leads to the breakdown of the material into simpler, non-toxic substances that can be assimilated back into the environment, thereby reducing waste and minimizing pollution.

In contrast, non-biodegradable substances are resistant to decomposition, persisting in the environment for long periods and often causing harm to ecosystems. Deteriorable refers more to materials that may break down chemically or physically over time but does not necessarily imply biological degradation. Recycling pertains to the process of converting waste materials into new products, which is a different concept entirely from biodegradation. Therefore, the correct term that describes the ability of a substance to be decomposed by living organisms is biodegradable.