How has the level of recycled materials changed since 1960
a) gone up
b) stayed the same
c) gone down
d) plummeted

What effect do the stanzas have on the meaning of this poem? a) each stanza asks the same question in different words. b) the stanzas do not work together to create meaning in the poem. c) each stanza presents a different aspect of the creation of the tiger. d) each stanza presents questions that are answered in the last stanza.