Can't figure out where in the HTML the child, the parent items?

Good evening, always see in articles such terms as "child" elements, "parent", etc. Googled, googled't understand anyway. Can I please clarify based on the following HTML code, thank you in advance.

the <div>
the <h1>

April 4th 20 at 14:16
2 answers
April 4th 20 at 14:18
It's like a hug.
Mom and dad (and sometimes uncle Rustem at the bus stop) hug their children (usually). Parents.

div embracing span. So div is the parent of span'have. And span — the daughter of his descendant.

span gave birth to an illegitimate daughter and called it the h1, in honor of her husband. Squeamish hugs.

For h1, span , a parent. Embrace through suffering.
Considered interesting) Thanks for the reply. - Jolie.Bednar38 commented on April 4th 20 at 14:21
April 4th 20 at 14:20
Well the DIV is the parent for all that is in it... and that's all. In turn, the span of its subsidiaries, and h1 is a child of the span...

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