What is the main struggle of the young narrator in "Helen and Frida"?

The question asks about the struggle of the young narrator in "Helen and Frida."

The story "Helen and Frida" by Amrita Pritam features a young narrator who is blind. Her primary struggle throughout the narrative is learning to cope with and adapt to her blindness.

Therefore, the correct option is D.

D. Adapting to blindness

The final answer is $\boxed{\text{D}}$