The fact that many assaults are committed by people wearing disguises—and that these disguised assaults are often the most vicious ones—illustrates the concept of

Illustrates the concept of "Deindividuation".

Deindividuation is an idea in social psychological studies that is by and large taken as the loss of self-awareness in gatherings. Sociologists additionally examine the phenomenon of deindividuation, yet the level of examination is fairly unique. Hypotheses of deindividuation recommend that it is a mental condition of diminished self-assessment and diminished assessment fear causing antinormative and disinhibited conduct.

where is the rest of the question. this isn't making sense. can you upload a picture of the question?