Final answer:
The
tag is used in HTML5 for grouping elements and defining structure on a web page, while semantic elements such as , , , , and provide meaning to specific content sections.
Step-by-step explanation:
The tag in HTML5 that is responsible for defining data and structure on a webpage is the <div> tag. The <div> tag is used to group together HTML elements and apply CSS styling and JavaScript actions to them. It does not inherently represent anything on its own, rather it serves as a container that can be used to structure a webpage's layout. For defining specific types of data or content sections, HTML5 provides a set of semantic elements like <article>, <section>, <header>, <footer>, and <aside> to give meaning to different parts of web content. These semantic elements help to create a better document structure, which is beneficial for both user accessibility and search engine optimization