Answer:
<em><u>It </u></em><em><u>is </u></em><em><u>the </u></em><em><u>statical </u></em><em><u>study </u></em><em><u>of </u></em><em><u>human </u></em><em><u>population</u></em>
<span>c. testosterone is the answer
</span>
Teenages perceive sexual activities as exciting and good. They think that is will be OK if they go ahead and try those things. When in reality, it will put them in greater risk of STD's or STI's, or an unwanted pregnancy. :)