The last line, 'Breed, crowd, encroach, expand, expunge yourself, die out', contains which figurative device?

Explanation

The repeated initial sounds (encroach, expand, expunge; die… detestable) make it alliterative.

Note: Passage I is Edna St. Vincent Millay's 'Apostrophe to Man' (1934), which is copyrighted and not reproduced. It savagely 'congratulates' humankind on breeding, crowding and making war, with bombers, explosives and death sold for profit, and ends by urging the 'detestable race' to expunge itself and die out.