Más ejercicios en pablomonteserin.com 
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<html lang="en">

<head>
  <!-- Required meta tags -->
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
  <meta name="robots" content="noindex, follow">
  <!-- Bootstrap CSS -->
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.1/dist/css/bootstrap.min.css" rel="stylesheet">


  <title>Hello, world!</title>

</head>

<body>


  <div class="container">
    <div class="row">
      <div class="col">

        <div id="carouselExampleCaptions" class="carousel slide" data-bs-ride="carousel">
          <div class="carousel-indicators">
            <button type="button" data-bs-target="#carouselExampleCaptions" data-bs-slide-to="0" class="active"
              aria-current="true" aria-label="Slide 1"></button>
            <button type="button" data-bs-target="#carouselExampleCaptions" data-bs-slide-to="1"
              aria-label="Slide 2"></button>
            <button type="button" data-bs-target="#carouselExampleCaptions" data-bs-slide-to="2"
              aria-label="Slide 3"></button>
          </div>
          <div class="carousel-inner">
            <div class="carousel-item active">
              <img src="https://place-hold.it/600x300" class="d-block w-100" alt="...">
              <div class="carousel-caption d-none d-md-block">
                <h5>First slide label</h5>
                <p>Some representative placeholder content for the first slide.</p>
              </div>
            </div>
            <div class="carousel-item">
              <img src="https://place-hold.it/600x300" class="d-block w-100" alt="...">
              <div class="carousel-caption d-none d-md-block">
                <h5>Second slide label</h5>
                <p>Some representative placeholder content for the second slide.</p>
              </div>
            </div>
            <div class="carousel-item">
              <img src="https://place-hold.it/600x300" class="d-block w-100" alt="...">
              <div class="carousel-caption d-none d-md-block">
                <h5>Third slide label</h5>
                <p>Some representative placeholder content for the third slide.</p>
              </div>
            </div>
          </div>
          <button class="carousel-control-prev" type="button" data-bs-target="#carouselExampleCaptions"
            data-bs-slide="prev">
            <span class="carousel-control-prev-icon" aria-hidden="true"></span>
            <span class="visually-hidden">Previous</span>
          </button>
          <button class="carousel-control-next" type="button" data-bs-target="#carouselExampleCaptions"
            data-bs-slide="next">
            <span class="carousel-control-next-icon" aria-hidden="true"></span>
            <span class="visually-hidden">Next</span>
          </button>
        </div>


      </div>
    </div>
  </div>

  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.1/dist/js/bootstrap.bundle.min.js"></script>

</body>

</html>