Answer:
Hyperbole
Explanation:
The literary device used in the given sentence is Hyperbole. Hyperbole is the exaggeration of the made claim. This helps in adding specific illustrated meaning to the given claim.
The given sentence presents an exaggeration of '200 million cameras' on the citizens to 'track and identify' their activities. Joe Bubar in his article "No Hiding Your Face?" presents the picture of technological advancements that has helped the citizens but at the same time had violated the privacy of the citizens. The government's activity of keeping a record has been exaggerated and presented here.
