Fill in the blank (_) in the following sentence from the following choices.
Sentence: During the child's development, the parents were required to get many books and not as many notebooks because the _ were not needed for learning.

Choice 1: During the child's development, the parents were required to get many books and not as many notebooks because the books were not needed for learning.
Choice 2: During the child's development, the parents were required to get many books and not as many notebooks because the notebooks were not needed for learning.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
1.