When water intake is low, spinal cells in the brain signal the pituitary to release

When water intake is low, spinal cells in the brain signal the pituitary to release ADH or antidiuretic hormone. The main function of ADH is increasing the urine concentration and thereby it helps in preserving the amount of body water lost in case of low water consumption by an individual. I hope the answer comes to your help.

C. naturally in the environment

Answerhave flowing water either episodically or during only a portion of the year;