JSX is the syntax that lets you write stuff that looks like HTML inside a JS file, like
function MyCoponent() {
return (<p>Hello</p>);
}
It’s not the literal word JSX.
And if you want to use the word “JSX” as the string of text it asks you to write, then the div you return still has to look like HTML, JSX has most of the same rules, you cant just jam the word in somewhere and hope it works.
<div /> is like <div></div>
but
<div className="classname"/> is like <div class="classname"></div>
similarly
<div jsx/> is like <div jsx></div>
but you need is
<div>jsx</div>