Analyzing Tone in Political Rhetoric

Read the following excerpt from a political speech delivered by an activist:

"We are faced with choices that affect not just our today but the futures of generations yet unborn. This is not merely a challenge; it is a clarion call for action, for courage, and for unwavering commitment to the ideals we hold dear. Let us rise together, shoulder to shoulder, and embrace the responsibility that comes with our power to vote, to speak, and to demand change!"

In the excerpt, how does the speaker establish their tone?