Answer:
The answer is "ethos."
Step-by-step explanation:
There are many types of persuasions when it comes to a person's speech. These types are used in order to convince an audience of a specific purpose that the speaker wants to achieve. In the sample above, it is clear that Kennedy is convincing the black people that he feels the same way as they are because of a "similar experience." This similar experience was Kennedy's experience of having a family member killed by a white man. This establishes his credibility as a listener and allows them to conclude that he is worth listening to. It also makes the situation sound fair to all.
Thus, this explains the answer.