Other. Chiropractors are physicians, all physicians are in health care and considered doctors, but not MDs. Vets are no DVMs, and podiatrists are DPMs.
Answer:
population and environment are integrated terms. They are interrelated in many respects. Health of an individual is directly associated with the environment in which one is living. Similarly, rapid population growth provokes massive environmental degradation.
I would say the answer is All of the above
