Final answer:
Barrier protections have the advantage of preventing both pregnancy and sexually transmitted infections (STIs), which other forms of birth control like hormonal methods do not offer.
Step-by-step explanation:
The advantage that barrier protections have over other kinds of birth control is primarily STI prevention. Unlike hormonal methods, intrauterine devices, and behavioral methods, barrier methods like condoms are designed to prevent both pregnancy and the transmission of sexually transmitted infections (STIs). Hormonal methods of contraception, though very effective in preventing pregnancy, do not offer protection from STIs. Cost-effectiveness may also be an advantage for barrier methods, especially when purchased in bulk, but their main distinguishing benefit is the ability to prevent the spread of infections during sexual activity. Additionally, barrier methods do not have the potential hormonal side effects associated with some hormonal contraceptive options.