What should be done immediately if a patient is showing signs of shock?

In cases of shock, immediate action is critical to stabilize the patient. Keeping the patient warm and NPO (nil per os, meaning nothing by mouth) is the appropriate action because shock can result in a state of reduced blood flow, leading to hypothermia. By maintaining the patient's body temperature, you help prevent further complications.

Additionally, keeping a patient NPO is important because the body may not be able to process food or fluids adequately during a state of shock. Administering food or water could pose risks, such as choking or aspiration, especially if the patient is unstable.

The other options compromise the patient's safety. For instance, encouraging walking could exacerbate the condition, as movement may further decrease blood flow to vital organs. Resting in a sitting position does not provide the best support for blood flow; lying down with legs elevated is typically more beneficial in shock situations to improve circulation to the heart and brain.