Answer:
The best summary of the excerpt is "Pangu grew inside an egg, then hatched into a giant creature, releasing shells that formed the sky and the earth. After Pangu died, he became the world and its elements."
Step-by-step explanation:
When you summarize a written work, you have to make a shorter version that includes all the important information easily and simply so this is accessible to all kinds of readers, this option simplifies the full story without omitting important information but it doesn't add unnecessary details which makes it a correct summary.