Which of the following terms is an example of a permanent hair reduction method?

The term related to a permanent hair reduction method is light-based. This technique typically involves the use of technologies like laser hair removal or intense pulsed light (IPL) therapy. These methods target hair follicles with specific wavelengths of light, effectively damaging them to reduce hair regrowth over time. Light-based techniques can substantially decrease hair density and create long-lasting results, making them a preferred choice for those seeking permanent hair reduction solutions.

In contrast, options such as shaving, sugaring, and threading are all temporary methods of hair removal. Shaving cuts hair at the surface of the skin, while sugaring and threading remove hair from the root but do not affect the hair follicle's growth cycle. These methods can lead to smoother skin for a short period, but they do not offer the same long-term results as light-based treatments.