Question

editing
research in an detailed study of

Answer 1

Cambridge English Dictionary defines "edit" as "to make changes to a text, film, etc., correcting mistakes or removing some parts, especially in order to prepare it for being printed or shown."

The purpose of editing exercises is to make students proficient in proof reading by helping them to identify and correct errors in a text.

   Incorrect                           Correct

(a) undertaking                      undertaken

(b) a                                         the

(c) for                                       of

(d) that                                     and