The reader get a feeling from reading the book that Amir thinks it is fair that he doesn’t have a child. Why do you think he thinks that? Your
He has a sense of order in the universe that almost makes this slight suffering transferable.
He doesn’t deserve to have one
It is fair that he doesn’t have a kid because he is not worthy
He blames Soraya for not having a child.

This question is incomplete, here´s the complete question.  

Read The Kite Runner , by Khaled Hosseini

The reader get a feeling from reading the book that Amir thinks it is fair that he doesn’t have a child. Why do you think he thinks that?

Your

He has a sense of order in the universe that almost makes this slight suffering transferable.

He doesn’t deserve to have one

It is fair that he doesn’t have a kid because he is not worthy

He blames Soraya for not having a child.

It is fair that he doesn’t have a kid because he is not worthy

Explanation:

Amir feels ruthless guilt for his previous selfishness, especially regarding Hassan. When he marries Soraya, his guilt is met with their inability to have a child, but Amir thinks that the sins from his past are the reason he doesn´t deserve to have a child. He even refuses to adopt, because "perhaps something, someone, somewhere, had decided to deny me fatherhood for the things I had done. Maybe this was my punishment, and perhaps justly so".

his tongue, i believe, was bloody and hanging out of his mouth.

he looked as if he were hungry.

he has several wolf-like qualities; a gray coat, sharp claws and yellow fangs.

those eyes made me feel, dear reader, like the end was near.

as i reached for a stick, he moved to the other side of the hill.

panting and hungry, he looked at me, a defenseless human and he snarled.

well i said my prayers, however, he simply turned and limped off.