Final answer:
Communicating about sex with strangers is a high-risk online behavior that could lead to sexual activity.
Step-by-step explanation:
The best example of a high-risk online behavior that could lead to sexual activity is communicating about sex with strangers. This behavior can be dangerous as it involves interacting with individuals who may have malicious intentions or who may coerce the student into engaging in sexual activities. It is important to prioritize online safety and avoid engaging in such conversations that can put one's well-being at risk.
Learn more about Online safety and high-risk behaviors