Changes in population demographics over the next 40 years will significantly affect the delivery of health care services. is the one change that will have the most impact on the practice of nursing.

The answer to the question: is the one change that will have the most impact on the practice of nursing, would be: the doubling in size, the increase, of the old-adult population, those 65 and older.

Explanation:

The reason for this being the answer, and why it will have such a huge impact, not just on the healthcare system, but also on the correct application of nursing care, is that as our population gets older, the more healthcare will be needed, and the more senior nursing care assistance will be required. This means that the demand for nurses specialized in senior care will double. Also, there will be an increased prevalence of chronic illnesses, and the need for long-term care. All of these will impact the healthcare system and the quality of nursing practice, overall.

9, 5, 10000000 ( that is supposed to be a ten for the last one)