26. Identify. What are two risk behaviors that pose a threat to the health of teens today? 27. Discuss. How are teens' perceptions of risk behaviors influenced by what they believe others are doing? 28. Synthesize. What is abstinence, and what are the effects of practicing abstinence?

26. Two risk behaviors that pose a threat to the health of teens today are substance abuse and risky sexual behavior.<br /><br />27. Teens' perceptions of risk behaviors are influenced by what they believe others are doing through peer pressure and social norms. If teens perceive that their peers are engaging in risky behaviors, they may be more likely to engage in those behaviors themselves.<br /><br />28. Abstinence refers to refraining from certain behaviors, such as sexual activity or drug use. The effects of practicing abstinence can include avoiding sexually transmitted infections, unplanned pregnancies, and potential legal issues related to drug use.