Elevated temperature in rabbits could indicate which of the following conditions?

Elevated temperature in rabbits is primarily indicative of Viral Hemorrhagic Disease (VHD). This disease is caused by a calicivirus and is known to lead to significant health issues in rabbits, including fever as a common symptom. When rabbits are infected, their body temperature may rise as a response to the viral invasion, reflecting the animal's immune response to combat the illness.

Additionally, VHD is characterized by other critical symptoms beyond just elevated temperature, such as lethargy, lack of appetite, and sudden death in severe cases. Recognizing these symptoms, especially elevated temperature, is vital for early diagnosis and intervention.

Other conditions listed, while they may show various symptoms in rabbits, do not typically present with fever as a primary sign. For example, myxomatosis causes swelling and lesions, ear mites lead to discomfort but not necessarily fever, and Rabbit Pox is not as common and tends to exhibit different symptoms. Therefore, the strong correlation between elevated temperature and VHD makes it the correct answer in the context of rabbit health monitoring.