Which of the following media features can be used in defining a media query? code example

Example 1: print media query css

@media print { 
 /* All your print styles go here */
 #header, #footer, #nav { display: none !important; } 
}

Example 2: media query in html style

span { background-image: url(particular_ad.png); }

@media (max-width: 300px) {
    span { background-image: url(particular_ad_small.png); }
}