1. Forest fires .......... for many different reasons.

2. Droughts as well as high temperatures and excessive winds .......... forest fires.

3. Lightning .......... are also responsible for starting forest fires at times.

4. Sometimes, humans also start forest fires by being .......... with cigarettes and campfires. They may not completely put out their campfires, and this behavior is dangerous and irresponsible.

5. Some fires are deliberately started by arsonists. Arsonists' .......... may vary, but starting a wild fire is always dangerous and thoughtless.

6. Some arsonists may start a fire because they want to file an insurance .......... Others may seek revenge, or the actions might be politically motivated.

7. However, not all forest fires are bad. Some are essential to natural ..........

8. If natural forest fires are not allowed to take place, forest floors may become overcrowded and new plant .......... doesn't occur.

9. Some trees actually require fires in order to grow. Their seeds will not .......... without them.

10. However, fires that are out of control can .......... quickly and devastate large areas in a short time.