The largest flightless bird which can run at a great speed is A)Penguin B)Kiwi C)Ostrich D)Emu
Option C) The Ostrich is the largest living species of bird. They usually weigh from 63 to 145 kilograms. Although it cannot fly, the ostrich is also the fastest-running bird today; it can run up to about 70 kilometres in an hour.
