The given answer includes various causes of elevated body temperature. These include infectious processes, such as infections caused by bacteria or viruses. Inflammatory processes, such as those occurring after surgery, injury, or due to immune disorders and diseases, can also lead to an elevated body temperature. Malignancy, or the presence of cancer cells in the body, can cause an increase in body temperature. Blood disorders, specifically acute hemolytic anemia, can also result in a higher body temperature. The body's response to certain drugs can also cause an elevation in body temperature. Lastly, hyperthyroidism, a condition where the thyroid gland produces excessive amounts of thyroid hormone, can lead to a higher body temperature.