Answer:
The quote from "My Heart Is Bursting" that best summarizes the message of Set'tainte's (Satanta) speech is:
"All of the land south of the Arkansas belongs to the Kiowas and the Comanches, and I don't want to give away any of it."
This quote directly conveys the main message of Set'tainte's speech, which is the assertion of ownership and refusal to relinquish any part of the land that belongs to the Kiowas and Comanches.
Set'tainte emphasizes that the entirety of the land south of the Arkansas River belongs to their tribes and expresses his unwillingness to give up any portion of it. By stating this, he asserts the rights and sovereignty of his people over their ancestral lands.
This quote reflects the central theme of resistance and the fight against encroachment on Native American lands. Set'tainte's words demonstrate the importance of land ownership and the determination to protect their territory from colonization and settlement.
Step-by-step explanation: