Which punctuation mark is used to indicate possession?

The apostrophe is used to indicate possession in the English language. When you want to show that something belongs to someone or something, you place an apostrophe followed by the letter "s" at the end of the noun. For example, in the phrase "the dog's leash," the apostrophe indicates that the leash belongs to the dog. In cases where the noun is plural (e.g., "the cats' toys"), the apostrophe is placed after the "s" to show that the toys belong to multiple cats.

Understanding the usage of apostrophes is essential for clear communication, particularly in writing, as it helps convey relationships and ownership accurately. Other punctuation marks, such as commas, periods, and colons, serve different purposes, such as separating items in a list, indicating the end of a sentence, or introducing additional information, respectively. Therefore, the apostrophe is specifically connected to indicating possession, making it the correct choice in this context.