Final answer:
The elements that remain the same on every page can refer to consistent features in web designs like headers and footers, or in the context of science, it refers to the basic substances listed on the periodic table, such as hydrogen and oxygen.
Step-by-step explanation:
The elements that remain the same on every page, depending on the context, could refer to several different things. If we are discussing web design and digital content, these could be elements that are part of the website's template or theme, such as a persistent header, footer, or navigation menu. For example, in a website's layout, the logo, main menu, and footer information might remain consistent across all pages to provide a cohesive user experience. In a different context related to printed or digital documents, headers and footers typically contain information such as the document's title, page numbers, and date, and these remain constant on every page. Similarly, book layouts often have consistent page numbers, chapter titles, or other graphical elements that maintain a unified look and feel across the entire book. In chemical science, the term 'element' is used in a completely different way. As stated in the reference, an element is a fundamental substance that cannot be broken down into simpler substances by chemical means, and all known elements are listed on the periodic table. Examples include hydrogen, oxygen, and carbon.