body {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 12px;
    background: url(https://l2etu.ecoledunet.com/beziers/Kafi_Asma/exo%2015/images_/fond.jpg);
}

h1 {
    background: black;
    color: white;
}

h2 {
    color: red;
    text-decoration: underline;
}

p {
   line-height: 25px; 
   text-align: justify;
}