If that is unclear, ask your instructor. If I cannot help much, I will refer you to the Skills Center. Technically, the internal marks listed above indicate structural breaks in the sentence. You might recall that a sentence is supposed to express a complete thought.
Punctuation is dumber.
I do not find the content boring. What turns my mind off is the repetitive, sing-song sentence structure. I can think in more sophisticated ways than this, and so can you. While the above are hardly a formal sentences for a formal essay in a composition class, I use them to illustrate a point. Short, single-thought sentences are choppy and dull.