Final answer:
Hemorrhage is the risk factor for hypovolemic shock, as it leads to a significant loss of blood volume, resulting in inadequate circulation and oxygenation of tissues.
Step-by-step explanation:
The risk factor for hypovolemic shock among the options listed is A. Hemorrhage. Hypovolemic shock is a type of circulatory shock caused by excessive loss of blood volume, which can result from acute blood loss due to hemorrhage. Hemorrhage leads to a decreased blood volume, resulting in the heart being unable to pump sufficient blood to the body, which compromises the delivery of oxygen and nutrients to the tissues. This condition is characterized by symptoms such as a rapid, almost tachycardic heart rate, a weak pulse, cool and clammy skin, rapid shallow breathing, hypothermia, thirst, and a dry mouth. Treatment involves providing intravenous fluids and medications to restore normal blood pressure and organ function.