Tossing their heads in sprightly dance is personification (giving a nonhuman thing human-like traits) so this is your answer. None of the others options are in the poem anyways even though all the other options are figurative language as well.
What are the sentences available prior to the question?
Answer: Part A: D They separated into different groups long ago.
Part B: The answer is: "it also seems like they didn't mix much with outside groups until the arrival of Europeans in the seventh century"
Explanation: I took the test hope this helps!
