Comma, colon or apostrophe

The answer to the crossword question “Comma, colon or apostrophe is MARK” is simply punctuation. Each of the three options listed – comma, colon, and apostrophe – are all types of punctuation marks that are commonly used in written language to separate or provide clarity to the text. While each mark has its own specific usage and rules for implementation, they are all classified as marks of punctuation. Punctuation plays an important role in making written language clear, understandable, and effective, and mastering the use of these marks can greatly improve one’s writing skills.