Which punctuation mark is typically used to start a list?

The colon is the punctuation mark that is typically used to start a list. It serves to introduce the items that follow, creating a clear expectation that a series of related elements are about to be presented. For example, if you were to write, "You will need the following items: a notebook, a pen, and a ruler," the colon indicates that a list of items is coming next, providing structure and clarity to the sentence.

In contrast, a comma is used to separate items within a list, while a semicolon often serves to connect closely related independent clauses or to separate items in a complex list where commas are also present. An apostrophe primarily indicates possession or the formation of contractions, making it unsuitable for introducing lists. Thus, the choice of the colon as the correct answer aligns with its established grammatical role in writing.