Explanation text explains how or why something happens or is made. It has a general statement describing a phenomenon, a sequenced explanation of how or why it changes with cause and effect language, and may include a concluding application or examples. An example explanation describes how tornadoes form, starting with stormy conditions that cause hot and moist air to rise and mix with cold air, forming a rotating funnel cloud. Tornadoes most commonly occur in tornado alley in the midwestern United States but can also impact other regions like South Canada, Africa, Asia, Europe, Australia, and Indonesia.