A selector can contain more than one simple selector. Between the simple selectors, we must include a combinator—something that explains the relationship between the selectors. There are three different combinators in CSS2, and one extra in CSS3; when we use them, they change the nature of the selector to reflect one of the following types:

In this Section

  1. Descendant Selector
    matches an element that’s a descendant of a specified element
  2. Child Selector
    selects an element that’s the immediate child of a specified element
  3. Adjacent Sibling Selector
    selects an element that’s an adjacent sibling to a specified element
  4. General Sibling Selector
    selects an element that’s a sibling to a specific element

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