In what context is UV disinfection mentioned in water treatment?

Ultraviolet (UV) disinfection is classified as a method of physical disinfection. This is because it uses UV light to inactivate microorganisms by disrupting their DNA, rendering them unable to reproduce and effectively neutralizing pathogens in the water supply without the addition of chemicals. The process relies on the physical properties of light rather than introducing any chemical agents, which distinguishes it from chemical disinfection methods that typically involve substances like chlorine or ozone.

The other options do not accurately describe the function of UV disinfection. It does not enhance flavor or serve as a technique for odor control, nor is it considered a chemical method since it does not involve adding any chemical disinfectants to the water. Thus, identifying UV disinfection as a physical method aligns with its operational characteristics and applications in water treatment.