The correct answer is A) deprivation.
The definition for deprivation is "the damaging lack of material benefits considered to be basic necessities in a society."
With this given, I feel that this should be the perfect answer.
It means a tiny part of a bigger picture so for example you are a tiny part of the world. Hope that answers your question.
Yes they do to clearly understand the story
to discover the theme in a poem or work of fiction, you must first find the main idea