Final answer:
The major possible cause of epilepsy, according to the provided information, is an injury to the brain. It can also be caused by infections or genetic factors, and managed with medication or surgery, although the exact cause often remains unknown.
Step-by-step explanation:
Epilepsy is a neurological disorder that is characterized by recurrent seizures, which are caused by abnormal electrical activity in the brain. A major possible cause of epilepsy, according to the information provided, is injury to the brain. Other potential causes can include infections like encephalitis, developmental disorders, or genetic factors. The disease can often be managed with the use of anticonvulsant medications or, in more severe cases, brain surgery to remove the region where seizures originate. However, the exact cause of epilepsy remains unknown in many patients, and it can be a mix of genetic and environmental factors.