Which term is used for substances that can be easily processed and decomposed?

The correct term for substances that can be easily processed and decomposed is "biodegradable." Biodegradable materials are those that can be broken down by natural biological processes, typically by microorganisms like bacteria and fungi, into simpler, non-toxic substances over time. This ability to decompose contributes to reducing waste accumulation in landfills and minimizing environmental impact, as these materials return to the ecosystem and do not persist for long periods.

In contrast, non-biodegradable substances resist decomposition and can remain in the environment for years, leading to pollution and other ecological issues. Reusable items are designed to be used multiple times before being disposed of, but they may or may not be biodegradable. Recyclable materials refer to those that can be processed and transformed into new products, but this recycling process is distinct from decomposition and does not imply that the substance is biodegradable. Thus, biodegradable specifically refers to the ease of decomposition by natural processes, making it the right choice.