The correct answer is Form new memories
It was thanks to the patient H.M. that the mechanisms for storing chronological facts, names, objects began to be understood; in short, from memory.
Before Molaison underwent experimental surgery in 1953 that removed an important region of his brain, this was an abstract concept. The doctors knew that the memory existed, but they had no idea where it was. Forgetfulness and amnesia were treated more in the offices of psychoanalysts than neuroscientists. Nobody was suspicious of the existence of different types of memory: a short-term memory, which allows you to memorize a phone number and dial it a short time later, and then forget it; and another long-term, through which facts, names and acquired skills are stored. Much less could scientists assume that long-term memory has subdivisions.