When would a forest be sustainable? A. When supply and demand are both zero B. When demand is greater than supply C. When demand increases while supply stays the same D. When supply is greater than demand

The sustainability of a forest hinges on maintaining a balance between the **supply** of forest resources (like timber, biodiversity, and ecosystem services) and the **demand** for those resources. For a forest to be sustainable: - **Supply** should either meet or exceed the **demand**. This ensures that resource extraction does not surpass the forest's natural regenerative capacity. Let's evaluate the options: - **A. When supply and demand are both zero:** This scenario is theoretical and doesn't reflect practical sustainability, as it implies no use or regeneration of forest resources. - **B. When demand is greater than supply:** This leads to over-exploitation, resulting in depletion of forest resources and loss of sustainability. - **C. When demand increases while supply stays the same:** An increasing demand without a corresponding increase in supply will eventually exhaust forest resources. - **D. When supply is greater than demand:** This scenario ensures that the forest can regenerate and maintain its resources over time, aligning with sustainable practices. **Therefore, the correct answer is:** **D. When supply is greater than demand**