Ajax tabs (wordpress)

Question

So, I am very new at Ajax and after reading some online tutorial, below is what I have understood. Please correct me if I am wrong.

Current Situation:

Answer 1

Retrieve the posted ID from $_GET['id'] and add it to the path.

$template_part_path = 'page/tab' . $_GET['id'];
<?php get_template_part($template_part_path); ?>