The provided CSS code uses the selector p[lang]. The [lang] portion is an attribute selector. Specifically, it is an attribute presence selector that targets an element (

in this case) if it has the specified attribute (lang) present, regardless of the attribute's value. This type of selector is used to style elements based on their HTML attributes.

Style is a general term for CSS rules or an HTML attribute, not a type of CSS selector.

An id selector uses a hash symbol (#) followed by the ID name (e.g., #example).

A class selector uses a period (.) followed by the class name (e.g., .example).

- Mozilla Developer Network (MDN). (2023). Attribute selectors. In CSS: Cascading Style Sheets. Retrieved from https://developer.mozilla.org/en-US/docs/Web/CSS/Attributeselectors. This page details the syntax for attribute selectors, including the presence selector [attr].

- W3C. (2018). Selectors Level 3. W3C Recommendation. Section 6.3: "Attribute selectors". Retrieved from https://www.w3.org/TR/selectors-3/#attribute-selectors. This official specification defines the syntax and matching rules for attribute selectors like [att].

- Meyer, E. A., & Weyl, E. (2017). CSS: The Definitive Guide, 4th Edition. O'Reilly Media. Chapter 4, "Selectors," provides a comprehensive overview of different selector types, including detailed explanations of attribute selectors.