Final answer:
The simultaneous presentation of march and dance themes in a musical piece is an example of a polyphonic texture.
Step-by-step explanation:
When listening to an audio clip where the march and dance themes are presented simultaneously, the musical texture is referred to as polyphonic. In a polyphonic texture, two or more musical lines are played together and are independent in rhythm and melody but harmonious when played in combination. This complexity of sound layers can often be observed in theatrical performances, which are considered multimodal texts due to the combination of drama, music, movement, and visual design. Such performances may feature sections in which different musical themes intersect, creating a rich and engaging auditory experience for the audience.