Read each sentence to find out whether there is any error in it. The error, if any, will be in one part of the sentence. Mark the part with the error as your answer. If there is no error, mark "No Error" as your answer. (Ignore the errors of punctuation).
Nature uses blurred boundaries all the time, avoiding abrupt interfaces, who are crack prone and require some kind of fastening together.
ANature uses blurred boundaries all the time,Correct AnswerIncorrect Answer