Chronic tissue hypoxia in children can be observed in patients who have history of tetralogy of Fallot, which is a condition of congenital heart disease that has abnormalities occurring simultaneously. Skin color changes, tachycardia, rapid breathing, wheezing, confusion, sweating, and coughing are also seen commonly in chronic hypoxia patients and this should be a hint in assessing the condition of the patient.
The answer is D; homeostasis allows the maintenance and regulation of stability and constancy that is needed to properly function. It is found in cells, tissues and organisms,
