Final answer:
Without specific quotes it's hard to say, but assertive speeches often use clear, direct, and definite language. Look for such language in the speech to identify the assertive tone.
Step-by-step explanation:
Without the specific quotes from the speech "My Heart is Bursting" by Satanta, it is challenging to pinpoint which most contributes to the assertive tone; however, an assertive speech often contains strong words of certainty, conviction, and directness. For example, if Satanta's speech includes statements like "I am unequivocal in my belief," or "I will not retreat," these would be clear demonstrations of an assertive tone. Assertiveness in speeches often takes the form of direct statements without qualifiers or hesitations.
To gain a deeper understanding, carefully read through the speech, track the usage of such strong, definitive language and see how it sets the tone of assertiveness by creating a confident and resolute image of the speaker. Remember, the use of assertive tone in speeches is a common practice and richly contributes to the effectiveness of the speech and strengthens the speaker's conviction.
Learn more about assertive tone