What is the primary function of a period?

• A. To separate clauses with a semicolon
• B. To indicate a pause longer than a comma
• C. To end a declarative sentence
• D. To show possessive form

Answer: (C)

Periods mark the end of a sentence, signaling that a thought is complete and a new sentence can begin. This is the main job of the period in standard writing: to close a declarative sentence that makes a statement. Other punctuation marks handle different tasks—semicolons link related independent clauses, question marks end questions, exclamation points show strong emotion, and apostrophes indicate possession or contractions. Periods can also appear in abbreviations, but that usage doesn’t change its primary role of ending a sentence. So, the period’s essential function is to end a declarative sentence.