Read the following paragraph:
Which one is it- an alligator or a crocodile? These two animals look almost the same because they are both reptiles with similar body parts and body structures. However, if you look closely, you will see some small differences. Crocodiles have long, narrow snouts shaped like a 'V', while alligators have wider snouts shaped like a 'U'. Unlike the alligator, you can see both the upper and lower teeth on a crocodile, and they are exposed in an interlocking pattern when the mouth is closed. However, you can only see an alligator’s upper teeth when its mouth is closed. Another slight difference is their color. A crocodile has an olive-brown color, while alligators are usually darker, almost black.
Determine which text structure was used in the paragraph above.