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Full Version: Selectors in CSS3
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Example:

<!DOCTYPE html>
<html>
<head>
  <title>Selectors Example</title>
  <style>
    /* Select the paragraph elements and apply a red text color */
    p {
      color: red;
    }
   
    /* Select all elements with the class "highlight" and apply a yellow background color */
    .highlight {
      background-color: yellow;
    }
  </style>
</head>
<body>
  <p>This is a paragraph with red text color.</p>
  <p class="highlight">This is a highlighted paragraph with a yellow background.</p>
</body>
</html>

Explanation:

CSS selectors are used to target specific HTML elements for styling. In this example, we use two types of selectors: the element selector (p) targets all p elements and applies a red text color to them. The class selector (.highlight) targets all elements with the class "highlight" and applies a yellow background color.