Briefly summarize the exposition of the necklace

Which of these are simple sentences and which are fragments? 1) bats are the true acrobats of the sky. 2) biobots are changing. 3) i could not answer. 4) sloths are amazing animals. 5) so we face big and difficult challenges. 6) we do not quit. 7) wintriness responded to wintriness. 8) human nature takes its shape in the years between one and five. 9) education can sometimes seem overwhelming 10) people who have seen them running wild in russia.