Introduction:
Industrial solid waste refers to the solid waste generated during industrial processes, such as manufacturing, production, and mining activities. These wastes can be categorized into different types based on their characteristics and properties. One common way to sort industrial solid wastes is by classifying them as biodegradable and non-degradable wastes.

Biodegradable wastes:
Biodegradable wastes are organic materials that can be broken down by natural processes, such as decomposition, into simpler substances. These wastes include food waste, paper, wood, and other organic materials. Biodegradable wastes can be further processed through composting or anaerobic digestion to produce valuable byproducts like compost or biogas.

Non-degradable wastes:
Non-degradable wastes, also known as non-biodegradable wastes, are materials that cannot be easily broken down by natural processes. These wastes include plastics, metals, glass, and certain chemicals. Non-degradable wastes pose a significant environmental challenge as they can persist in the environment for a long time and may cause pollution and habitat destruction if not properly managed.

Reason for correct answer:
The correct answer to the given question is option 'D' - biodegradable and non-degradable wastes. This is because sorting industrial solid wastes into biodegradable and non-degradable categories helps in determining suitable waste management strategies and treatment methods.

Benefits of sorting industrial solid wastes:
- Efficient waste management: Sorting industrial solid wastes allows for the implementation of appropriate waste management practices, such as recycling, composting, and landfilling.
- Resource recovery: By segregating biodegradable and non-degradable wastes, valuable resources can be recovered from the waste stream. For example, biodegradable wastes can be converted into compost or biogas, while non-degradable wastes can be recycled or used for energy generation.
- Environmental protection: Proper sorting and disposal of industrial solid wastes help prevent environmental pollution and reduce the overall impact on ecosystems. Non-degradable wastes, in particular, require special handling to ensure they do not accumulate in the environment.
- Compliance with regulations: Many countries have regulations in place that require industries to appropriately manage their solid wastes. Sorting wastes into biodegradable and non-degradable categories helps industries comply with these regulations and avoid penalties.

Conclusion:
Sorting industrial solid wastes based on their biodegradability is an important step in waste management. By distinguishing between biodegradable and non-degradable wastes, industries can implement suitable treatment and disposal methods, minimize environmental impacts, and recover valuable resources. This sorting process contributes to sustainable waste management practices and helps to create a cleaner and healthier environment.