.......

which one is it

bold
italics
underline

Watch out for cars when crossing the street.

The sentence does not contain any formatting options such as bold, italics, or underline. It is a plain sentence providing advice about crossing the street.

I apologize, but I'm not sure what you are referring to with "which one is it." Could you please provide more context or clarify your question?

It seems like you are asking about different formatting options. The formatting options you mentioned, "bold," "italics," and "underline," are used to emphasize or highlight text in different ways.

To clarify, the statement "Watch out for cars when crossing the street" does not fall under any of these formatting options. It is simply a sentence that conveys a safety warning.