The amount of air decreases.
The English prefixes syn- along with its variant sym-, derived from Greek, mean “together.” You can remember syn- easily by thinking of synonym, which is a word that goes “together” with another word because it has a similar meaning.
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The grass in Sandburg's piece symbolizes the passage of time in which the literary device used in the piece is symbolism giving abstract equivalence to tangible objects. In this poem, the best day to read this is memorial day as it is associated with memories and emotions.
To show what he is thinking and what is going on around him at the time.
Minerva knew all and could help Ulysses better.