Answer: -He needed to form alliances with other tribes in order to help his family survive.
Explanation:
GIven the fact that at that time in his life, his family was living a very precarious and meagre life, the sable coat served as a simbolic gesture when he surrendered it to a neighbouring leader. By this gesture, Genghis Khan recognized him as an adoptive father, integrating him and his family into the tribe. The leader had been an old ally of Gengis' boiological father, and the gesture ensured that his family would have protection against other hostile tribes of the steppe, as they were taken in as members of their tribe.
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