Which sentence best states the purpose of elaboration in historical writing?

Give example of metaphors and similes

What do the sketches of 9/11 victims in "portraits of grief" achieve?

Choose the sentence that is not logically connected in the paragraph. (1) one final effect of radio and tv on the language must must be noted. (2) there is no doubt that these great media of information have cut down considerably the time that used to be devoted to reading. (3) radio and tv may enhance the spoken word. (4) they tend to lower comprehension levels.