Answer:
Pathos
Step-by-step explanation:
The rhetorical appeal that both authors employ in these lines is pathos. Pathos refers to an appeal to emotion. This is employed when an author uses emotional words in order to convince the audience of supporting a particular position. In this example, Lincoln uses words such as "so nobly" in order to persuade the audience of thinking about those who fought at Gettysburg as brave and noble. Moreover, Whitman employs this device when he uses emotional words such as "fallen cold and dead."