The correct option is (a) Broken down by biological processes. Biodegradable substances like food waste, paper, and leaves decompose naturally through bacteria and fungi, turning into harmless products. They don’t accumulate in the environment and are eco-friendly compared to plastics.
cbse sample paper class 10 science 2025-26
class 10 science half yearly paper
The correct answer is: (a) Broken down by biological processes. Biodegradable substances are materials that can be naturally broken down by bacteria, fungi, or other living organisms into harmless products. Examples include food waste, paper, and leaves. They don’t accumulate in the environment and are eco-friendly, unlike non-biodegradable substances that persist and harm ecosystems.