The correct sentence is:
Each person’s brain develops and forms new connections, but it is not aware of these changes.
The antecedent of the pronoun "it" is "each person’s brain".
Answer:
i believe it is displaced
Explanation:
Independent clause this is because they is the subject , know is the verb so simply is the adjective. all a sentence need to stand on its own is a noun and a verb :)your welcome