Use the drop down to complete each one

blah

explanation: bc blah

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion

feral cats are estimated to eat tens of millions of native animals each night in australia

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.