<section class="one">
            <div id="first-section" class="container-fluid first-section">
                <img src="src/CarLine.jpg" alt="Tours and Transfers"
        class="first-section-background">
                <h2 class="title-first-section">TAKE A LAP TOURS <br>&
        TRANSFERS: the <br>service you need
                </h2>
            </div>
        </section>

img {
            width:100%;
        height:auto;
          }