I think D. are made of rigid cartlage
The answer is tighten and contract.
In order for the students to pull the rope their muscles will need to tighten and contract so they are able to continuously pull with all their strength and power. Relaxed or twitched muscles will result in release of the rope.
Answer:Tyler
Explanation: why is because he is the only one crying and isnt trying to her die peacefully in comfort, and doesn't even say a word to her mother
Answer: Those parts is were all the oxygen is distributed through the human body, and so technically it can be considered the respiratory system.
