Which element of a speech can establish tone and rhythm that engage the audience?

The element of a speech that can establish tone and rhythm that engage the audience is delivery.

Here's why:

* Tone: The speaker's voice, including pitch, volume, and pacing, can convey a wide range of emotions and attitudes, influencing the audience's perception of the message. A passionate, energetic tone can create excitement, while a calm, thoughtful tone can inspire trust.

* Rhythm: The speaker's use of pauses, emphasis, and variations in speed can create a sense of flow and rhythm that keeps the audience engaged. A speech with a consistent rhythm is more likely to hold the listener's attention than one that feels monotonous or erratic.

While other elements like language (word choice, imagery) and structure (organization, transitions) contribute to the overall impact of a speech, delivery is the key element that brings it to life and connects with the audience on an emotional level.