Final answer:
Burst-suppression on an EEG indicates a state of deep anesthesia. It reflects significantly subdued brain activity, often seen with the use of general anesthetics, which can be administered through inhalation or injection.
Step-by-step explanation:
Burst-suppression is a pattern seen on an electroencephalogram (EEG) representing an alternating pattern of high amplitude activity (bursts) and flat line EEG (suppression). It indicates that brain activity is significantly subdued and is often seen under conditions of deep anesthesia, medically induced coma, or in severe brain injury.
General anesthetics are drugs used to induce a state of anesthesia - that is, a temporary loss of sensation or awareness. These drugs elicit various reversible effects like immobility, analgesia, amnesia, unconsciousness, and a reduced autonomic response to noxious stimuli. The drugs can be administered as gases or vapors (inhalational anesthetics), or as injections (intravenous anesthetics), commonly combined for both induction and maintenance of anesthesia.
In response to the student's question, burst-suppression indicates a state of deep anesthesia. Thus, the correct answer to the question 'What state of anesthesia does burst-suppression indicate?' is: 3) Deep anesthesia.