Answer:
his
Explanation:
the bottle is in possesion of the son
The theme in this poem talks about the hardships of life. Here the author shows a father who is explaining to his son that his life wasn't easy. This is evident when he compares life with stairs and how the stairs are filled with "splinters, And boards torn up, And places with no carpet on the floor" and how life wasn't as smooth as a "crystal stair". Then he states no matter how hard it was to go through those tacks and splinters barefoot he was able to keep on climbing. Then the father tells his son not to turn back because he himself is still climbing.
