Final answer:
Reagan uses pathos in paragraph 10 to honor the victims of the Challenger disaster, connecting emotionally with the audience and paying tribute to the astronauts.
Step-by-step explanation:
In paragraph 10 of his speech, Reagan likely uses an appeal to pathos to honor the victims of the Challenger disaster. This rhetorical strategy is intended to connect with the audience on an emotional level, allowing them to feel the gravity of the loss and to share in the collective mourning. While Reagan was skilled in various rhetorical strategies, including employing humor and folksy wisdom, in this instance, the pathos is used to acknowledge the human element of the tragedy and to highlight the national unity in grief and respect for the astronauts who lost their lives.