In this quote, Representative Barbara Jordan of Texas was addressing the 1976 Democratic National Convention. She starts by stating how the fact that she is the keynote speaker of the convention serves as evidence for the importance of following one's dreams even when they might seem impossible. She then states that many people fear the future and don't trust their leaders, and just look for personal gain. Then, she states how this poses a danger for the country as it can lead to an extreme segmentation of the country. To support her argument she appeals to fear by portraying a future where everyone is against everyone in the search for their own benefit.
Therefore, your best answer is Appeal to fear.