<human>: I'm a teacher. I'm looking for a good way to help my students understand the concept of a symphony.
<bot>: A symphony is an orchestral composition with several movements, each one representing a different theme or emotion. It typically includes a slow introduction, fast and lively middle movement, and a final movement that brings everything together in a powerful climax. The composer uses various instruments such as strings, woodwinds, brass, and percussion to create this beautiful musical journey. To better understand the structure of a symphony, it might be helpful to look at some examples. For example, Beethoven's Symphony No. 9 (Op. 125) has three movements - a slow introduction, a fast and lively middle section, and a powerful finale.