What distinguishes fish from amphibians in terms of habitat?

The distinction between fish and amphibians in terms of habitat primarily revolves around their respective water requirements and lifestyle adaptations. Fish are aquatic organisms that primarily inhabit water, which serves as their primary habitat for feeding, reproduction, and overall survival. They are specifically adapted to living in water, requiring it not only for respiration through gills but also for locomotion and other life processes.

In contrast, amphibians have a unique dual lifestyle that links them closely to both terrestrial and aquatic environments. While they typically begin life in water as larvae (tadpoles) and can often return to water for breeding, they are also adapted to life on land as adults, capable of breathing air and often possessing moist skin for respiratory functions.

Therefore, the choice that states fish primarily live in water captures the essential difference in habitat between fish and amphibians, highlighting that while fish are dedicated to an aquatic existence, amphibians bridge both water and land.