______ of the brain (ESB) involves sending a weak electric current into a brain structure to stimulate it.

(a) Electric Stimulation
(b) Instinctual Stimulation
(c) Sensical Stimulation
(d) All of the above
✅ Correct option: (a) Electric Stimulation
Explanation: ESB (Electrical Stimulation of the Brain) uses a mild electric current to activate specific brain areas.