which risk is common with both tanning and tattoos?\ncancer\nhepatitis\nirritation\nallergic reaction

Brief Explanations:

• Tanning: UV radiation from tanning beds or sunlight can damage skin cells' DNA, increasing cancer risk. Tattoo inks (especially some pigments) may have carcinogenic substances (though less common than tanning - related cancer risks, but still a potential).
• Hepatitis: Tanning itself doesn't directly cause hepatitis (unless there's contaminated equipment in a tanning salon which is extremely rare). Tattooing with unsterilized needles can transmit hepatitis. So not a common risk.
• Irritation: Tanning can cause skin irritation (sunburn). Tattooing can cause local skin irritation during the process. But it's a short - term and less serious compared to cancer in terms of long - term health risks.
• Allergic reaction: Tanning (e.g., to some tanning lotions) can cause allergic reactions. Tattoo inks (especially red, green, blue inks) can cause allergic reactions. But again, cancer is a more severe and long - term common risk.

Answer:

cancer