All of the following except _____ are factors that increase the likelihood of an elderly person developing a pressure ulcer?

The correct answer is D, dramatic loss of melanin. Melanin is a pigment responsible for skin color and does not play a role in the development of pressure ulcers. Shearing, decreased body weight, and malnutrition (decreased serum albumin) are all known risk factors for pressure ulcers in the elderly. Shearing can lead to tissue damage, decreased body weight can indicate poor nutrition and muscle wasting, and malnutrition can impair wound healing and skin integrity. Therefore, D is the correct answer as it does not contribute to the likelihood of an elderly person developing a pressure ulcer.