In Microsoft Word and most other text editing applications, pressing the Enter key is the standard and most common action to start a new paragraph. When you press Enter, the cursor moves to the beginning of the next line, and a new paragraph mark is inserted. This paragraph mark carries its own formatting properties, such as line spacing, indentation, and alignment, allowing for distinct blocks of text.
Let's examine why the other options are incorrect: The Shift key is typically used for capitalization or, when combined with Enter (Shift + Enter), it inserts a soft return or a line break within the same paragraph, rather than starting a new one. The Alt key is generally used for accessing menu shortcuts or in combination with other keys for special characters or functions. Ctrl + Enter is a specific shortcut used to insert a page break, forcing the text after the cursor to begin on a new page, not just a new paragraph on the current page. Thus, the Enter key alone is the correct method for initiating a new paragraph.