A. Ethosuximide (Zarontin) is the first-line medication for absence seizures (previously called petit mal seizures). Absence seizures are characterized by brief lapses in consciousness, often lasting only a few seconds, and are most common in children. Ethosuximide works by reducing the excitability of neurons in the thalamus, which helps prevent these generalized non-convulsive seizures. B. Focal impaired seizures (also called complex partial seizures) originate in a specific area of the brain and involve altered consciousness. Treatment usually involves carbamazepine or other antiepileptic drugs, not ethosuximide as first-line therapy. C. Focal aware seizures (previously called simple partial seizures) involve localized seizure activity without loss of consciousness. Ethosuximide is not typically used for these seizures. D. Simple partial seizures are the same as focal aware seizures. Ethosuximide does not target this seizure type, as it is most effective for generalized, non-convulsive absence seizures.