Final answer:
Azawagh Arab women most often cite the influence of Western ideals and cultural changes as the main reason for the decline in the tradition of female fattening.
Step-by-step explanation:
The main reason cited by Azawagh Arab women for the ongoing decline in the tradition of female fattening is the influence of Western ideals and cultural changes. In an interview with Rebecca Popenoe, Azawagh Arab women expressed that the younger generations are increasingly influenced by Western ideas of beauty, which prioritize slimness over traditional ideals of beauty that value larger bodies. The women mentioned that the media, such as television and social media, play a significant role in promoting these Western ideals.