Which of the following resources cannot be conserved?

Analyze the question: We are asked which resource cannot be conserved. Conservation means protecting, managing, and using resources wisely so they last for future generations.

Explain the concept: Natural resources that can be managed, protected, or replenished can be conserved:

• Forest: conserved through afforestation, reforestation, forest reserves, and controlled logging.
• Water: conserved by avoiding wastage, protecting water sources, and preventing pollution.
• Soil: conserved through crop rotation, mulching, cover cropping, terracing, and contour ploughing to prevent erosion and loss of fertility.
• Garbage: this is waste. It is not a natural resource that we protect or preserve. We do not "conserve" garbage; we dispose of, recycle, or manage it. The goal is to reduce it, not to keep it for future use.

Step-by-step solution:

1. Check A (forest): can be conserved, so it is not the answer.
2. Check B (water): can be conserved, so it is not the answer.
3. Check C (soil): can be conserved, so it is not the answer.
4. Check D (garbage): it is waste material, not a resource to be preserved, so it does not fit the idea of conservation.

Answer: D. garbage

Tip: Conservation applies to useful natural resources (forests, water, soil, wildlife, minerals). When you see words like "garbage," "waste," or "refuse" in a conservation question, think of waste management (reduce, reuse, recycle), not conservation.