The main purpose of Abraham Lincoln's purpose for writing the Gettysburg Address was to dedicate a cemetery. The correct option among all the options that are given in the question is the first option

​President Lincoln delivered the 272 word Gettysburg Address on November 19, 1863 on the battlefield near Gettysburg , Pennsylvania . " Fourscore and seven years ago our fathers brought forth , on this continent , a new nation , conceived in liberty , and dedicated to the proposition that all men are created equal .