Nerves. The brain and spinal cord are part of the CENTRAL nervous system, and the kidneys are part of the renal system.
I would say the answer would be either yoga or cardio
Poor social and economic circumstances affect health throughout life. ... Such psychosocial risks accumulate during life and increase the chances of poor mental health and premature death. Long periods of anxiety and insecurity and the lack of supportive friendships are damaging in whatever area of life they arise.
B. drinking can lead to health problems
