What is the difference between UV tanning and spray tanning?

The correct response highlights a fundamental distinction between the two tanning methods: UV tanning involves the use of artificial light sources like tanning beds or natural sunlight to stimulate the skin's production of melanin, which leads to a tan. This process relies on ultraviolet radiation, which can have associated risks such as skin damage and increased chances of skin cancer over time.

In contrast, spray tanning involves the application of a solution containing dihydroxyacetone (DHA) directly onto the skin. This solution reacts with the amino acids in the outermost layer of the skin, resulting in a temporary tan that typically lasts several days. Spray tanning does not involve UV exposure, making it a safer alternative for those looking for a bronzed look without the risks linked to UV radiation.

The other choices either inaccurately reflect the characteristics of UV and spray tanning or do not address the essential differences that define each method. For example, UV tanning being "safer" or "less effective" can be subjective and depend on individual circumstances and goals, while claiming that UV tanning involves natural sunlight exposure doesn't capture the broader definition, which includes artificial sources as well.