The activity that can spread an STI from the options given is sharing needles, as it allows for direct transmission of blood. Other activities like giving blood, using public toilets, and swimming in public pools do not facilitate STI transmission. Understanding these differences is crucial for prevention.
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The activity that can spread an STI among the options provided is sharing needles, as it allows for direct blood transfer. Other options like giving blood, using public toilets, and swimming in public pools do not facilitate STI transmission. Thus, sharing needles poses a significant risk for infections like HIV. ;