Janice knew plants produce oxygen. she added extra water plants to her aquarium to benefit her fish. the next morning, fish were gasping at the surface of the water. explain why.

The reason they are at the surface trying to breathe is due to a lack of dissolved oxygen in the water.

Explanation:

Her fish are not trying to say hello, they are trying to tell her that they are in survival mode.  The reason they are at the surface trying to breathe is due to a lack of dissolved oxygen in the water.

littering streams           is the answer