A colon directs your attention to the words or the sentence after it. It signals that what comes after will explain, describe, illustrate or define what came before. A colon can introduce an independent clause, a group of words that contains a subject and a verb and forms a complete thought. Or, it can introduce a word or short phrase. When a colon appears in a complete sentence, it always comes after an independent clause. In which sentence is a colon used correctly? (A) I understand why people love: waterskiing. (B) I don't like boats: they make me very seasick. C Alyshia: she loves her puppy more than she loves her fish. (D) Love is what makes: the world go round.

The correct usage of a colon in a sentence is when it introduces an independent clause or a word/phrase that explains or describes what came before. In option (A) "I understand why people love: waterskiing", the colon is used correctly as it introduces a word/phrase that explains or describes what came before. In option (B) "I don't like boats: they make me very seasick", the colon is used correctly as it introduces an independent clause that explains or describes what came before. In option (C) "Alyshia: she loves her puppy more than she loves her fish", the colon is used correctly as it introduces a word/phrase that explains or describes what came before. In option (D) "Love is what makes: the world go round", the colon is used correctly as it introduces a word/phrase that explains or describes what came before. Therefore, all the options (A), (B), (C), and (D) use a colon correctly.