Although schizoid and avoidant personality disorders both display social withdrawal, those with avoidant personality disorder, unlike those with schizoid personality disorder, .

desire relationships with others but are hindered by fear of being rejected or shame.

Explanation:

Schizoid and avoidant personality disorders are a set of mental disorder with maladaptive behavior that is characterized by similar symptoms of which detachment from social interaction is a similar symptom of both. Although, persons having schizoid personality disorder and persons having avoidant personality disorder maybe socially awkward, a distinguishing symptom common to those with avoidant personality disorder is that, they desire or want relationships but are hindered because of fear or rejection and criticism.

the maintenance of fluid balance during exercise. author information: fluid supplementation is necessary for exercise in which fluid losses must be offset by intake to avoid the negative effects of hypohydration on health and performance.

since you have not provided the options here i   am going to give you general overview about hormone.hormone are actually the part of endocrine system in our body and produced by the endocrine glands. the hormones act like a chemical messenger   within human body. once produce by the glands they   travel through the blood stream and reach at specific or target tissue and organs   which result in control of our body function. the hormones are specific in their work and work on only the targeted tissue or organ   . with the of hormone endocrine system regulate the heart rate , metabolism, our mood and   growth as well as the development and even the sleeping cycle etc. they actually are the messenger for body cell and organs .