Symptoms involved with somatoform disorders feel very real to the patient but are often imagined, especially when they are unable to be diagnosed.

this is true

Explanation: The somatoform disorders are a group of psychiatric disorders that cause unexplained physical symptoms. They include somatization disorder (involving multisystem physical symptoms), undifferentiated somatoform disorder (fewer symptoms than somatization disorder), conversion disorder (voluntary motor or sensory function symptoms), pain disorder (pain with strong psychological involvement), hypochondriasis (fear of having a life-threatening illness or condition), body dysmorphic disorder (preoccupation with a real or imagined physical defect), and somatoform disorder not otherwise specified (used when criteria are not clearly met for one of the other somatoform disorders). These disorders should be considered early in the evaluation of patients with unexplained symptoms to prevent unnecessary interventions and testing. Treatment success can be enhanced by discussing the possibility of a somatoform disorder with the patient early in the evaluation process, limiting unnecessary diagnostic and medical treatments, focusing on the management of the disorder rather than its cure, using appropriate medications and psychotherapy for comorbidities, maintaining a psychoeducational and collaborative relationship with patients, and referring patients to mental health professionals when appropriate.

fluid balance is an aspect of the homeostasis of organisms in which the amount of water in the organism needs to be controlled, via osmoregulation and behavior, such that the concentrations of electrolytes (salts in solution) in the various body fluids are kept within healthy ranges. the core principle of fluid balance is that the amount of water lost from the body must equal the amount of water taken in.

out of the choices i'd say d the ability to set goals, mainly because to desire to continue you need motivation but it isn't motivation in that part, but setting goals means you have an endgame and you want to reach it which sums up motivation.