“They tied me up, then, plumb / amidships, back to the mast, lashed to the mast, / and took themselves again to rowing.”
The purpose of an introduction in a paragraph is to introduce the subject (of the artical, text,essay,ect...) and grab the reader's attention (on the topic).
The error is in the first sentence- “shine brightly” should be “shines brightly” because the subject is singular.
TV is educational due to constant news being viewed and educational shows, documentaries, etc.