Final answer:
Option A: The inclusion of wetlands and lagoons in subdivision plans likely reflects the principle of sustainable development, aiming to harmonize environmental protection with human needs.
Step-by-step explanation:
The designers of a new subdivision of homes that includes wetlands and lagoons connected to a water treatment plant most likely applied the conservation principle of sustainable development. Sustainable development is a conservation strategy that integrates growth with environmental stewardship, aiming to benefit both the economy and the environment.
Integrating water treatment with natural watery habitats suggests an approach prioritizing both human needs and ecological functions, making the subdivision more eco-friendly and reducing the environmental impact of human settlements. This principle often includes habitat restoration, biodiversity conservation, and promoting ecosystem resilience, but its primary aim is to ensure that development meets the needs of the present without compromising the ability of future generations to meet their own needs.