Which punctuation mark is used to indicate the end of declarative sentence:

🧠 Explanation:

A full stop, or period, is used to indicate the end of a declarative sentence, signaling a complete thought. Essential in written English, it ensures clarity and structure, distinguishing one idea from another. Unlike commas or semicolons, it marks a definitive pause. Understanding punctuation like the full stop is crucial for effective writing, enhancing readability in essays, reports, or professional communication. This rule is foundational in grammar, ensuring precise expression across academic, literary, and workplace contexts.