Which structural observation best describes the poem “grass”

The answer is:

The poem’s short sentences and simple structure emphasize the bleak reality of war.

Carl Sandburg's poem "Grass" is written in simple sentences and free verse, so it does not contain a systematic meter or rhyme pattern. In that respect, the author intends to direct attention to the dreary and desolate truth about war. In this way, the poem suggests that grass hides human degradation after war.