Final answer:
A transition is the section of intermediate tempo that connects two large music sections, serving to bridge different themes or keys and create a cohesive musical experience.
Step-by-step explanation:
The section of intermediate tempo that might connect two large sections in a piece of music is known as a transition. This transition acts as a bridge that smoothly moves the listener from one thematic or musical idea to another, which can be fundamental in compositions such as symphonies, sonatas, or even in modern song structures. The use of transitions help to create a cohesive musical experience and prevent abrupt changes that could disrupt the flow of the music.
In more formal or classical structures, such as sonata form, a transition may link sections with contrasting themes or keys, like the exposition and development sections. In popular music, a transition might manifest itself as an instrumental bridge or a change in rhythm or harmony that prepares the listener for the next verse or chorus. Understanding the purpose and effect of transitions is crucial for appreciating how composers and songwriters construct their music.