In a lake ecosystem, sunlight that reaches the water helps green algae grow in and on the water, as in the picture shown below.

Algae produce oxygen. Tiny animals that live in the water eat the algae. Small fish eat the tiny animals, absorb oxygen with their gills, and give off carbon dioxide as waste. Plants use the carbon dioxide to grow.

Which of the following would happen if the algae disappeared?
The tiny animals would not have enough food.
Fish would not have enough oxygen.
Plants would lose some of the carbon dioxide they need to grow.

theirs more than one right answer