Final answer:
The loss of aquatic life due to pollution is an indication of environmental degradation.
Step-by-step explanation:
The loss of aquatic life due to an abundant build-up of pollution is an indication of Environmental degradation. When pollution accumulates in water bodies, it can harm and even kill aquatic organisms, disrupting the balance of the ecosystem. For example, excessive nutrients from human sources can lead to eutrophication, causing algal blooms and hypoxia, which can result in the death of aquatic life.