Which of the following methods can relieve strain on the abdomen for a patient suffering from abdominal pain?

Elevating the head and placing a bolster under the knees is an effective method for relieving strain on the abdomen for a patient experiencing abdominal pain. This position helps to decrease tension in the abdominal area by promoting relaxation of the abdominal muscles and reducing pressure on the abdomen. By elevating the knees, this technique also encourages a more comfortable alignment of the pelvis and spine, which can further alleviate discomfort.

Other methods, while potentially beneficial in certain contexts, do not specifically target alleviating strain on the abdomen in the same way. Applying heat may soothe pain but does not address the physical strain directly. Deep breathing exercises can help with relaxation and pain management overall, but they do not provide the physical support to the abdomen that the bolstering does. Providing firm abdominal support might actually increase discomfort or strain rather than relieve it, as it could compress the abdomen further. Thus, the chosen method effectively reduces tension and enhances comfort for those with abdominal pain.