Respuesta :

Unprotected sex, drugs, drinking, and not sleeping. 

Answer:

Substance abuse, (alcohol or drugs) unsafe sex practices, reckless driving, and  activities like  extreme sports

Explanation:

Most of the mentioned behaviors result as peers pressure. Most teenagers tend to engage in risk taking activities, if they are together and their inhibited behavior is commonly seen rather than doing that would endanger by themselves.

They also strive for identity so they are willing to gain reputation by doing such things.

Social psychologists identify teenagers seeking social approval, and so they have a potential to ignore some restraints if they do it in presence of others.

It is still suggested  that social actions tend to free repressed emotions and act as trigerrs, substance abuse, heavy alcohol consumption, unprotected sexual intercourse,happen as they do not necessarily weigh consequences when deciding whether or not to carry them on.