Facial scans evaluate which of the following characteristics?

Facial scans primarily evaluate unique features of an individual's face, which include specific biometric characteristics such as eye widths and nose ridges. These elements are crucial in the facial recognition process because they help create a mathematical representation of facial geometry, enhancing the ability to distinguish between different individuals.

Using features like eye widths allows the technology to create a reliable template for comparison against stored data, while nose ridges provide additional identifying marks that contribute to the accuracy of the recognition process. The technology focuses on the unique relationships and dimensions of these facial landmarks to identify or verify a person's identity effectively.

While skin texture and color might play a role in broader biometric analyses or could be factors in some recognition systems, they are not the primary metrics used in the scanning process. Body temperature and posture, as well as heart rate and breathing patterns, pertain to other biometric identification methods but are not relevant to facial recognition technologies. Thus, the focus on eye widths and nose ridges accurately represents the essentials of facial scan evaluations in identity and access management practices.