MCQ Detailed View

The term biodegradable refers to substances that can be broken down naturally by microorganisms such as bacteria, fungi, and other decomposers. When a material is biodegradable, it returns to the environment in a natural cycle, without causing long-term pollution.

Among the given options, dead plants are biodegradable. Plants, like all living organisms, are made of organic matter such as cellulose, proteins, and natural compounds. When plants die, microorganisms decompose them into simpler substances like carbon dioxide, water, and nutrients. These nutrients enrich the soil and support the growth of new plants, completing the natural life cycle.

In contrast, materials like cans and glass are non-biodegradable. These substances do not break down naturally in the environment and can remain for hundreds or even thousands of years. For example, glass bottles and metal cans often accumulate in landfills and contribute to pollution unless they are recycled.

Understanding the difference between biodegradable and non-biodegradable materials is important in environmental science and waste management. Using biodegradable products reduces pollution, conserves resources, and supports a healthy ecosystem. Examples of biodegradable substances include food waste, paper, cotton, and wood. Non-biodegradable examples include plastics, metals, and synthetic chemicals.

This knowledge also highlights the importance of sustainable practices, such as composting, recycling, and reducing single-use plastics. By choosing biodegradable materials whenever possible, humans can minimize environmental damage and preserve natural resources for future generations.

Therefore, the correct answer is Dead Plants, because they can naturally decompose and return to the ecosystem, unlike cans and glass which are non-biodegradable.