Which of the following should you press to insert a line break?

To insert a line break in applications like Microsoft Word or in text processing, pressing Shift+Enter is the correct action. This command allows you to create a new line without starting a new paragraph, which differs from simply pressing the Enter key. When you use Enter alone, it typically moves the cursor to the next line and adds space, indicating the start of a new paragraph.

Using Shift+Enter is particularly useful when you want to maintain the formatting of the paragraph while still separating lines, like in addresses or when you want to insert a line break in a list format without extra spacing. This functionality helps in keeping text organized while visually distinguishing separate thoughts or components on the same subject line.