The theme of the book Among the hidden relates to real life because the people in the world are not free to have the number of children they want in the world.
This is known to be the central idea of a literary text.
Hence, we can see that the theme in the book is that freedom. Jen is obsessed with getting freedom and with the other hidden children as well.
Read more about themes here:
https://brainly.com/question/25336781
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