In taking a description of a person, what three types of characteristics should you observe?

The selection of general, specific, and changeable characteristics is essential when describing a person, as it provides a comprehensive framework for accurate identification. General characteristics offer a broad overview, allowing one to establish a basic understanding of the individual's appearance. Specific features add detail and precision, helping to create a clearer mental image or aiding in identifying the person among others. Changeable characteristics account for aspects that may vary, such as hairstyle or clothing. This approach ensures that descriptions are not only thorough but also adaptable to different contexts and scenarios.

The other options, although they contain relevant aspects of observation, lack the holistic organization that the correct answer provides. For instance, height, weight, and attire focus too narrowly on physical attributes without accommodating the varied nuances of observation necessary for effective identification. Age, gender, and ethnicity can be important in constructing an image, yet they do not encompass the breadth of characteristics needed to describe someone effectively. Similarly, color, size, and shape represent only visual attributes and fails to include broader transitions or aspects that can change, making them less effective in varied circumstances. Overall, the emphasis on a structured approach with general, specific, and changeable characteristics leads to more reliable and useful descriptions.