Final answer:
The correct application of environmental sustainability from the provided options is sustainable forestry, which is based on managing forest resources without depleting them for future generations and maintaining ecosystem health.
Step-by-step explanation:
The application of environmental sustainability among the provided options is d) Sustainable forestry. Sustainable forestry involves managing forest resources in a way that meets current needs for products like lumber without compromising the health of the forest or the ability of future generations to utilize these resources. This concept adheres to sustainability principles, prioritizing the balance between resource extraction, ecosystem health, and biodiversity. Sustainable forestry may employ methods like selective logging, maintaining a mix of tree ages and species, and restoring damaged areas to ensure the resilience and longevity of forest ecosystems. In contrast, options a and b, sustainable fossil fuels and sustainable oil, are often considered non-renewable resources and their extraction and use typically involve significant environmental impact, deviating from sustainability practices. Option c, sustainable monocrops, is generally not considered sustainable due to its association with high pesticide and chemical fertilizer use and reduced biodiversity.