I think it would be Number 4
Answer:
The answer is<em> "Failure is a part of human life."</em>
I think school principal and high school teacher
The bladder, first and foremost, is a balloon-like organ in the lower abdomen that stores and collects urine. The bladder's elastic walls expand to store urine in the same way as a balloon does when it absorbs water.
This paragraph does a couple of things for the piece.
1. It introduces the types of stress teens face. (Sentence 1)
2. It introduces the main subject matter of the piece. (Sentence 2, "And" to "cope")
3. It backs up the claim of the piece by supporting it with factual evidence of sited sources.(the rest of sentence 2.)
