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<html><title>W3.CSS</title><meta name="viewport" content="width=device-width, initial-scale=1"><link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css"><body><div class="w3-container"> <h2>Dropdown Paragraph</h2> <p>Move the mouse over the paragraph to open the dropdown content.</p> <p class="w3-dropdown-hover">Hover over me! <span class="w3-dropdown-content w3-green w3-padding">Hello World!</span> </p></div></body></html>