Colors can be measured and quantified in various ways; indeed, a person's perception of colors is a subjective process whereby the brain responds to the stimuli that are produced when incoming light reacts with the several types of cone cells in the eye.
unit of service. unit of service. any individual, family, aggregate, organization, or community given nursing care. The level at which service is delivered varies with the particular unit entity.
What is a Service Dog? A service dog is defined as a dog that has been trained to perform tasks to assist an individual with disabilities. It is the ability to perform observable tasks, on command, that distinguishes a service dog from an emotional support dog, therapy dog or other working dogs.