An infinitive phrase can function in a sentence as a(n)

In washwoman who is the narrator telling the story

Ispeak without a mouth and hear without ears. i have no body, but i come alive with wind. what am i?

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.