What “great task” does Abraham Lincoln refer to in the last paragraph of his speech?

President Lincoln is reminding people that although the ceremony was dedicated to those fallen on one battlefield and their achievements in victory that the Civil War was continuing and there was more to be done.

abraham mean:s: making the battlefield a holy resting place.

Explanation:

because he talks about the soldiers dying and them not dying in vain he is standing up for the people who died.

иσ σиє тяυℓу киσωѕ ιf нє ∂ιє∂, кαωαкι кιℓℓє∂ нιм ιи тнє мαиʝα тнσ

would cloning of animals be allowed to prevent extinction?