Answer:
An ecosystem that contains insects, water, algae, and birds all work together by feeding one-another.
Explanation:
Algae are typically found within water. Algae use carbon dioxide, converting water to organic matter and oxygen. They are important sources of dissolved oxygen in a water confine.
Now, since algae help water by oxygenating it, living things are able to drink the water.
..This helps the bird, since it needs to drink water. As all living things do.
Sorry if this is a little confusing!
