Risky online behavior for a child, would be talking to someone they don't know, and talk about meeting them in the real world. It doesn't even have to mean meeting them in the real world for the purposes of having sex. That can be in the mind of the adult. They can make that happen over time, once they've gained the trust of the child. But meeting for any purpose in the real world with an adult that they don't know. The second risky behavior would be sending sexually explicit images of themselves. It's risky enough to send any image of themselves, but far riskier to send a sexually explicit image of themselves. Sending either one of those images would be risky behavior.