I believe the correct answer is naive.
The author is trying to say that he was ignorant, and that he couldn't understand properly these new revelations. He was either too young or too stupid to understand such a thing, but he believes he will as he grows older.
Answer, normal text will be plot, underlined will be setting, bold will be character:
<u>It was the middle of the morning when she stepped out into the beautiful kingdom of ice. The animals watched as the sun started to set. The forest all around them grew black with night.</u> The king was a proud and powerful man. Even though he was only as tall as a dandelion, he commanded the entire room’s attention. Kenneth entered the dark cave and defeated the dragon. Now that he’d protected the city, he could finally marry the princess. The young boy stood his ground as the large snake attempted to attack him. He stepped to the side and used his gleaming sword to frighten it away. The boy was about 12 years old. He’d never been outside his village, but he dreamed of seeing distant kingdoms and learning about the world.
