The correct answer is - norms, sexual activity in books, alcohol and drug use.
Explanation:
Sexual activity of an individual person can be affected by the different kinds of factors and influences. These factors are directly or indirectly influence the mindset of an individual.
Norms about sexual activity are one of the factors that directly influences the perception of an individual. Others factors that can influence the perception are alcohol or other drug use and sexual activity in books.
Thus, the correct answer is - norms, sexual activity in books, alcohol and drug use.
