Read Each Paragraph and Place [Brackets] Around the Topic

Short Answer

Read each paragraph and place [brackets] around the topic.
-Most tornadoes travel from southwest to northeast, but the direction of travel can be erratic and may change suddenly.Tornadoes usually travel at an average speed of 30 miles per hour.The wind speed of a major tornado may vary from 100 to 300 miles per hour.The wind speed of the devastating 1999 tornado was measured by Doppler radar to be 312 miles per hour, the highest ever recorded. Shipman, Todd, and Wilson, An Introduction to Physical Science, 11th edition