The word that best describes the tone in this stanza is: happy.
This stanza was taken from the poem I Hear America Singing, by Walt Whitman. It's a poem of patriotism, of pride of each and every person who helps build America and make it what it is. Everyone is important: the carpenters, the mechanics, the masons, the mothers, the wives. All of them sing their melodious songs of freedom and opportunity.
personification is the right answer because shadow was compared to a living being
A both live in same environments right answer
I'm pretty sure it's context, because it's the answer that makes the most sense.
