Explanation - Why Do People Build Bridges?

This term we have been writing different types of explanations based on different topic. Throughout the 2 previous weeks we have been writing a explanation about why people build bridges. In a explanation we need a introduction, 3 paragraphs, and a conclusion. In my explanation I included information about transportation, how we use bridges today, and drowning. I've also used one of the interesting hooks in my introduction. The hook that I've decided to use it the list. It was easy to copy and paste our introduction into our conclusion, but change some information.