Conservation refers to the sustainable and responsible use of natural resources to ensure their availability for future generations. It involves managing and preserving resources in a way that minimizes waste and prevents depletion. Conservation is essential to maintain ecological balance and protect the environment.

The correct answer to the question is option 'C', which states that complete use of natural resources is an example of conservation. Let's explore why this is the correct answer.

Explanation:
Use of Natural Resources:
- Natural resources are materials or substances found in the environment that are valuable to humans.
- Examples of natural resources include air, water, soil, minerals, forests, and wildlife.
- These resources are essential for various purposes such as food production, energy generation, construction, and manufacturing.

Conservation of Natural Resources:
- Conservation involves using natural resources in a sustainable manner to meet the current needs without compromising the ability of future generations to meet their own needs.
- It aims to balance resource utilization and preservation, ensuring the long-term availability and health of natural resources.
- Conservation practices can vary depending on the specific resource being managed.

Explanation of the Options:
a) No use of natural resources:
- This option suggests not using natural resources at all, which is not practical or feasible.
- Human activities rely on natural resources for survival and development.
- Complete avoidance of resource use would hinder economic growth and human well-being.

b) The wise use of natural resources:
- This option aligns with the concept of conservation.
- The wise use of natural resources refers to utilizing resources efficiently and responsibly.
- It involves adopting sustainable practices, minimizing waste, and promoting resource management strategies.

c) Complete use of natural resources:
- This option is incorrect as it suggests utilizing natural resources completely without any consideration for conservation.
- Complete use would lead to resource depletion, environmental degradation, and an inability to meet future needs.

d) Excess use of natural resources:
- This option is incorrect as it implies using natural resources in excessive amounts.
- Excessive use can lead to resource exhaustion, habitat destruction, and negative impacts on ecosystems and biodiversity.

Conclusion:
Conservation entails the responsible and sustainable use of natural resources. It involves striking a balance between resource utilization and preservation. While complete use of natural resources is not an example of conservation, the wise use of resources is essential to ensure their availability for future generations.