Special Agent Entrance Practice Exam

What punctuation mark is described as indicating the end of a sentence?

1. Comma

2. Colon

3. Period

4. Question Mark

The correct answer is: Period

A period is the punctuation mark that signifies the end of a declarative sentence. It plays a fundamental role in written communication, indicating that a complete thought has been expressed. When you see a period, it informs the reader that the idea is finished, allowing them to pause before moving on to the next sentence. This clear delineation supports clarity and organization in writing, ensuring that sentences can be easily understood and followed. In contrast, the other punctuation marks each serve different purposes; for instance, a comma is used to separate elements within a sentence, a colon introduces lists or explanations, and a question mark indicates an interrogative sentence, prompting a response or indicating inquiry. Each of these punctuation marks contributes to the structure of sentences but does not indicate a full stop like a period does.