Which poetic device is used when silverstein writes, "and watch the way the word-web weaves"

alliteration
paradox
irony
imagery

what poetic device is used in the lines, "the branches of the poet tree reach from the mountains to the sea? "

hyperbole
simile
imagery
irony

what poetic device is used in the line, "just don't get hit by falling rhymes? "

simile
personification
paradox
idiom

The best answer for the first question would be alliteration, because the letter W occurs in consecutive and/or adjacent words in the sentence "Watch the way the word-web weaves". 

For the second question, the best answer would be hyperbole, since the sentence contains exaggeration.

For the third question, the best answer would be personification, since a human element is added to inanimate objects. 

Hope my answer has come to your help.