Final answer:
The risk factors of STIs include a history of STIs, a sexual partner who has an STI, failure to use condoms, substance abuse, use of intravenous drugs or a sexual partner who uses them, and multiple sexual partners.
Step-by-step explanation:
The risk factors of STIs include:
- a history of STIs
- a sexual partner who has an STI
- failure to use condoms
- substance abuse
- use of intravenous drugs or a sexual partner who uses them
- multiple sexual partners
These risk factors contribute to the spread of STIs among young people who may engage in risky behaviors and have a lack of knowledge about STI transmission and protection.