Final answer:
Malala Yousafzai's best friend and academic rival is Moniba, as described in her book 'I Am Malala: The Girl Who Stood Up for Education and Was Shot by the Taliban'.
Step-by-step explanation:
Malala's best friend and academic rival is Moniba. The book I Am Malala: The Girl Who Stood Up for Education and Was Shot by the Taliban provides a detailed account of Malala Yousafzai's life and her relationships. For instance, it narrates her competitive and friendly relationship with Moniba, emphasizing the nature of their connection and how Moniba was a significant figure in Malala's life. Her experiences are not just stories of rivalry but also of the deep bonds of friendship that helped her endure challenging times.