But, in a larger sense, we can not dedicate-we can not consecrate-we can not hallow-this ground. The brave men, living and dead, who struggled here, have consecrated it, far above our poor power to add or detract. The world will little note, nor long remember what we say here, but it can never forget what they did here.
Who does Lincoln appeal to in order to win the audience’s sympathy?

slaves in the south
soldiers who fought and died there
himself
children whose fathers were killed at Gettysburg

Soldiers who fought and died there

Explanation:

the brave men have consecrated it.

all he talks about is how the men fought and some even lost their lives

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).

the first option is the answer