Resource sustainability is best defined as:

Resource sustainability focuses on managing resources in a way that ensures their availability for future generations. This involves using resources responsibly, considering ecological balance, and implementing practices that minimize depletion while maintaining the health of ecosystems. The careful management of resources prioritizes long-term usage over short-term gains, which is crucial for ensuring that natural and human-made resources remain accessible and viable in the future.

Contrasting this, immediate satisfaction through resource use does not incorporate the considerations necessary for long-term sustainability, as it may lead to depletion and ecological harm. Increasing consumption over time, while sometimes correlated with economic growth, does not guarantee resource sustainability and often contradicts it if it leads to overexploitation. Lastly, restricting resource usage does not inherently equate to sustainable management; it might prevent overconsumption but does not necessarily promote the careful handling and regeneration of resources for future use. Proper resource management encompasses not just usage limits but also informed decision-making that considers the health of the ecosystem and the needs of future populations.