Final answer:
The underlined word 'allegiance' in the sentence refers to a citizen's loyalty to his or her government.
Step-by-step explanation:
The underlined word in the sentence, 'A citizen owes allegiance in exchange for certain rights,' is a citizen's loyalty to his or her government. Allegiance refers to a person's loyalty and support towards a particular group or cause. In this context, it specifically refers to a citizen's loyalty to their government in exchange for certain rights granted to them as a citizen of that country.
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