Answer:
Alex should use the "Responsive Navigation Menu" or "Hamburger Menu" design. This design condenses an extended list of hyperlinks into a single icon - usually represented by three parallel horizontal lines (resembling a hamburger) - that expands upon tapping. This approach ensures a clean, uncluttered mobile interface while still providing easy access to the full list of navigational links by simply tapping the icon. Depending on the design, the links may show up either as a dropdown list or a sidebar menu.