The HTML <style> element is used to embed CSS (Cascading Style Sheets) rules directly within an HTML document. These styles define how the HTML elements should be displayed.

The HTML <style> element is used to embed CSS (Cascading Style Sheets) rules directly within an HTML document. These styles define how the HTML elements should be displayed.

Let's evaluate the options:

• "To link external JavaScript files to the HTML document" is incorrect. JavaScript files are linked using the <script> tag.
• "To include CSS styles directly within an HTML document" is correct. This is the primary function of the <style> element.
• "To define the document structure and layout for printing" is partially true in that CSS can affect print layout, but the primary role of <style> is to apply styles generally, not exclusively for printing, and document structure is defined by HTML tags.
• "To store webpage metadata such as author and date" is incorrect. Metadata is stored using the <meta> tag within the <head> section.

The correct option is:

• To include CSS styles directly within an HTML document.