It decreased the salt content of the water. It increased the evaporation rate of the water. It increased the number of fish in the lake. It decreased the volume of the lake.
I gave my students this multiple choice question: A lake has been used for more than a century to irrigate crops. How has this practice most likely affected this resource?

Only one answer is correct among these 4 choices:
- It decreased the salt content of the water.
- It increased the evaporation rate of the water.
- It increased the number of fish in the lake.
- It decreased the volume of the lake.

Could you tell me which one is correct?

It decreased the volume of the lake.