Both freshwater and saltwater provide habitats for many living things. Here's why:

* Freshwater: Rivers, lakes, ponds, and wetlands are home to a diverse array of fish, amphibians, insects, plants, and more.

* Saltwater: Oceans, seas, and estuaries support a vast range of marine life, including whales, dolphins, fish, coral reefs, and countless microscopic organisms.

Therefore, both freshwater and saltwater environments are crucial for the survival of many species.