Question

drag the missing word into place
throughout history, many governments have been known to
certain citizens by restricting their freedom.

systematic
persecute
genocide

Explanation:

To solve this, we analyze the context: the sentence needs a verb to describe what governments do to citizens by restricting freedom. "Persecute" means to harass or oppress, fitting the context. "Systematic" is an adjective, and "genocide" is a noun, so they don't fit grammatically or contextually as the missing verb.

Answer:

persecute