Natural resources are the materials and substances found in the environment that are valuable to humans. They are essential for the survival and development of life on Earth. Let's explore the correct option regarding natural resources, which is option C: Non-mineral resources include air and water.

Definition and Types of Natural Resources
Natural resources are classified into two main categories: renewable and non-renewable resources.

Renewable resources are those that can be replenished or regenerated naturally over time. Examples of renewable resources include sunlight, wind, water, forests, and fertile soil. These resources have the capacity to renew themselves and can be used indefinitely without depletion.

Non-renewable resources, on the other hand, are finite in nature and cannot be replenished once they are depleted. Examples of non-renewable resources include minerals (such as coal, oil, and natural gas), metals, and fossil fuels. These resources take millions of years to form and are being consumed at a much faster rate than they are being replenished.

Non-Mineral Resources: Air and Water
Non-mineral resources encompass a wide range of natural resources other than minerals. Two significant examples of non-mineral resources are air and water.

- Air: Air is a vital non-mineral resource that is essential for the survival of all living organisms. It is composed of various gases, primarily nitrogen (approximately 78%) and oxygen (approximately 21%). Air is necessary for respiration, the process by which organisms obtain energy from food. It also plays a crucial role in the water cycle, climate regulation, and the dispersal of seeds and pollen.

- Water: Water is another essential non-mineral resource required by all living organisms. It covers about 71% of the Earth's surface and is found in lakes, rivers, oceans, glaciers, and underground aquifers. Water is essential for drinking, irrigation, sanitation, transportation, and various industrial processes. It also supports aquatic ecosystems and plays a critical role in regulating the Earth's temperature.

These non-mineral resources, air and water, are crucial for the survival and well-being of all living beings. They are renewable resources that can be conserved and managed to ensure their availability for future generations.

Conclusion
In conclusion, natural resources are valuable assets that provide us with the necessary materials and substances for our survival and development. While non-mineral resources include air and water, they are distinct from mineral resources such as coal and oil. Understanding and conserving these resources is essential to ensure a sustainable future for our planet.