When you preview something, you inspect it. Previewing helps you get a glimpse of what's ahead before you read or something, kind of like skimming.
The answer is magazines because I'm pretty sure that it means something that is printed.
Answer:
The waves beside them danced is A
*I wandered lonely as a cloud is D
*They stretched in never-ending line is C
*What wealth the show to me had brought is B
Explanation: