Listed below are mostly vestigial structures. Select the one that serves a purpose in humans
(1 point)
Otail: tail bone in humans versus long tails for balance and in other animals like lizards and wolves
O hair raising: in humans versus raising hackles to appear larger and aggressive in other animals like cats and monkeys
Opelvis: supports upper body and attaches to lower body in humans versus being tiny and nonfunctional in legless and snakes animals like whales
O ear muscles: ability to wiggle ears in humans versus rotating ears to hear predators in prey animals like deer and rabbits