Which of the following represents a line break in C++?

In C++, a line break is represented by the escape sequence \n. This sequence instructs the compiler to move the output cursor to the beginning of the next line when printing text to the console or output stream. This is particularly useful for formatting output in a way that makes it more readable by separating different pieces of information onto new lines.

The other options represent different escape sequences. \t represents a tab character, which adds horizontal spacing; \b represents a backspace, which moves the cursor back one character; and \r is a carriage return, which moves the cursor to the beginning of the current line but does not advance it to the next line. Understanding these distinctions is crucial when formatting output correctly in C++.