Answer:
I HOPE I HELPED
Explanation:
the concerns of the challenges of being a US teen: what the data shows anxiety and depression serious mental stress is a fact of the life for many Americans alcohol and drugs in society and depression are the only concerned for us teens bullying and cyberbullying gangs poverty and teen pregnancy.THIS IS THE ANSWER BUT I PUT IT IN THE WRONG SPOT MY BAD
Pulmonary circulation transports oxygen poor blood from the right ventricle to the lungs to get oxygenated.
It is usually the first sentence of the paragraph
Your answer is 90% hope this helps.