Which option is the best example of a theme in a speech

A literary work such as music that creates a mood is an example of theme in a speech.

Explanation:

The theme statement is considered as that statement that deals with a piece of art that can be music as well as literature. The theme is referred to as the main subject, the theme should be such that the reader is not confused while reading it. From a theme a reader can understand how a writer has critically analysed the work. A literary work should be done in such a way that it creates a mood for the reader.