A problem with DOM

Question

I am wondering if the nodechild is indentified by sequence or by default , here is the exaple for my question :
by sequence , when :
<div>
<p></p>
<div>
==> because <p> is inside <div> , so <p> is child of <div>???? OR
by default :
<p> by default is child of <div>??/?
Please help me with a clearly explanation :D thank you

Answer 1

<div>
<p></p>
<div>
==> because <p> is inside <div> , so <p> is child of <div>

Is the correct answer.
The tags inside a tag are the children, no matter what the tags are.