Answer:
The key thrust that was not part of the student movements in the 1960s that were crucial to the development of Africana studies is:
Women's rights movement.
While the women's rights movement was an important social and political movement that emerged in the 1960s and had a significant impact on American society, it was not a central part of the student movements that were crucial to the development of Africana studies. The other three options, the Free Speech Movement, the Anti-War Movement, and the Black Power Movement, were all significant social and political movements that emerged during the 1960s and played a crucial role in the development of Africana studies.