Which of these marine ecosystems is known for filtering pollutants and providing habitat for young fish? Deep-sea trenches Estuaries Coral reefs

## Step 1<br />The question asks us to identify which marine ecosystem is known for filtering pollutants and providing habitat for young fish. The options provided are Deep-sea trenches, Estuaries, and Coral reefs.<br /><br />## Step 2<br />Deep-sea trenches are the deepest parts of the ocean floor. They are not known for filtering pollutants or providing habitat for young fish.<br /><br />## Step 3<br />Coral reefs are underwater ecosystems that are characterized by reef-building corals. They are known for their biodiversity, but they do not filter pollutants.<br /><br />## Step 4<br />Estuaries, on the other hand, are where rivers meet the sea. They are known for their ability to filter pollutants and provide a habitat for young fish. This is because the freshwater from the river mixes with the saltwater from the sea, creating a unique environment that is rich in nutrients and provides a safe haven for young fish.