Which universal theme does this poem build on? brave, brave were the soldiers (high named to-day) who lived through the fight; but the bravest press'd to the front and fell, unnamed, unknown. (from "the bravest soldiers" by walt whitman)
a. heroism
b. death and rebirth
c. salvation
d. love and duty

a. heroism

The poem repeatedly talks about the bravery of soldiers both alive and those that lost their lives.

A) heroism.

Explanation: In literature, the theme is the underlying message of a story, it is  what critical belief about life is the author trying to convey in the writing of a novel, play, short story or poem. Usually this belief, or idea, is universal and transcends cultural barriers. In the given excerpt we can see developed the theme of heroism, exemplify by the soldiers who lived through the fight and also those who died.

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