II. Choose and write the letter of the correct answer. 6. Why is water cycle important? a. It is a source of money. b. It causes droughts. c. It provides people, animals, and plants with water. d. It is not useful to us. 7. What would happen if the water cycle stopped? a. Stopping it would cause endless drought. b. Stopping it would clean our rivers. c. Stopping it would make the plants grow. d. None of the above. 8. Which of the following human activities affect the water cycle? a. Cleaning up streams and rivers b. Swimming and fishing c. Damming rivers for hydroelectricity d. Planting trees along the river banks. 9. How can we protect our water sources? a. planting trees b. using chemicals C. burning fossil fuels​