Lincoln’s focus in the gettysburg address was to
a. campaign for a reelection.
b. describe the impact of the civil war.
c. remind listeners why they were at war.
d. illustrate the importance of the union and freedom.

Lincoln’s focus in the Gettysburg Address was to remind listeners why they were at war. The correct option among all the options that are given in the question is the third option or option "C". The other choices can be easily negated. I hope that this is the answer that has actually come to your help.

B. to provide flood control 
i believe