Group Options

  
<select>
                <option value="">Select your favourite movie</option>
                <optgroup label="Action">
                    <option value="">Avengers</option>
                    <option value="">Die Hard</option>
                    <option value="">Fast & Furious</option>
                    <option value="">The Dark Knight</option>
                    <option value="">The Karate Kid</option>
                </optgroup>
                <optgroup label="Animation">
                    <option value="">Despicable Me</option>
                    <option value="">Ice Age</option>
                    <option value="">Kung Fu Panda</option>
                    <option value="">Madagascar</option>
                    <option value="">The Lion King</option>
                </optgroup>
                <optgroup label="Horror">
                    <option value="">Mirrors</option>
                    <option value="">Scream</option>
                    <option value="">The Final Destination</option>
                    <option value="">The Grudge</option>
                    <option value="">The Ring</option>
                </optgroup>
                <optgroup label="Sci-fi">
                    <option value="">Inception</option>
                    <option value="">Frankenstein </option>
                    <option value="">The Matrix</option>
                    <option value="">Interstellar</option>
                    <option value="">Back to the Future </option>
                </optgroup>
</select>

KBD

The <kbd> tag is used to define keyboard input.

<section>
    <p class="margin">Close this window by pressing <kbd>Esc</kbd></p>
    <p class="margin">Copy to clipboard (Windows) <kbd>Ctrl</kbd> <kbd>c</kbd></p>
    <p class="margin">Copy to clipboard (Mac OS) <kbd>Cmd</kbd> <kbd>c</kbd> </p>
</section>  

Highlight text

The <mark> tag defines text that should be marked or highlighted..

 <section>
        <h2 class="h2">World War II</h2>
        <p class="p">
            World War II (WWII or WW2), also known as the Second World War (after the recent Great War), was a global
            war that lasted
            <mark>from 1939 to 1945</mark>, though related conflicts began earlier. It involved the vast majority of the
            world's nations—including all of the great powers—eventually forming two opposing military alliances: the
            Allies and the Axis. It was the most widespread
            war in history, and directly involved more than
            <mark>100 million people from over 30 countries</mark>. In a state of "total war", the major participants
            threw their entire economic, industrial, and scientific capabilities behind the war effort, erasing the
            distinction between civilian and military resources.
            Marked by mass deaths of civilians, including the
            <mark>Holocaust</mark> (during which approximately 11 million people were killed) and the strategic bombing
            of industrial and population centres (during which approximately one million people were killed, including
            the use of two nuclear weapons in combat),
            it resulted in an estimated 50 million to 85 million fatalities. These made World War II the deadliest
            conflict in human history.
        </p>
 </section> 

Small quotes

The <q> tag defines a short quotation.

<section>
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</section>
                                

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