Answer:
They increase environmental quality by preventing resource overuse.
Step-by-step explanation:
Marine protected areas are regions of the seas and oceans that are restricted from human activities.
The goal of marine protected areas is to conserve naturally available resources in the ocean. To conserve resources, materials are used resonably in order to prevent them from being limited in terms of availability.
When a marine area is protected, the enviromental quallity improves because biodiversity of life and resources can be perfectly in check.