Answer:
Body Image:
What is you opinion on the amount of daily exercise teens require?
About how many people are physically fit in the United States?
Hormonal and chemical changes in teens:
Do teens have proper growth in terms of hormones like testosterone and estrogen?
Are hormones in teens nowadays in proportion as they should be or is drug use affecting this abnormally?
Gender Development Issues:
Are newborns nowadays born with more or less genetic mutations than 30 years ago?
Is there a correlation between substance abuse in adults and gender development issues in their kids?
a comet struck and a chain of problems happened which wiped yhe dinosaurs out
The prepositional phrase is "on a high shelf" since ON is a preposition.
