css - Remove space above and below <p> tag HTML

Question

Take this ul for example:

<ul>
    <li>HI THERE</li>
    <br>
    <li>
        <p>ME</p>
    </li>
</ul>

Answer 1

<p> elements generally have margins and / or padding. You can set those to zero in a stylesheet.

li p {
    margin: 0;
    padding: 0;
}

Semantically speaking, however, it is fairly unusual to have a list of paragraphs.