What role does UVB radiation play in the tanning process?

UVB radiation plays a multifaceted role in the tanning process. It is primarily responsible for triggering the production of melanin in the skin, which leads to the darkening effect commonly associated with tanning. This response occurs as the skin attempts to protect itself from the damaging effects of UV radiation.

Additionally, UVB radiation stimulates the production of vitamin D, which is crucial for bone health and various biological functions. It is essential for the absorption of calcium and phosphorus, thereby promoting overall health.

Furthermore, UVB exposure is also linked to the risk of sunburn, which serves as an indicator of overexposure to UV radiation. Sunburn occurs as a result of excessive UVB exposure, leading to skin inflammation and redness.

Given these roles, the correct answer encompasses all aspects: UVB radiation darkens the skin, triggers vitamin D production, and can cause sunburn, thereby affirming that all the provided statements collectively illustrate the impact of UVB radiation in the tanning process.