Why has adult abandoned his past?

Explanation:

Abandonment issues stem from a fear of loneliness, which can be a phobia or a form of anxiety. These issues can affect your relationships and often stem from a childhood loss. Other factors that turn loss into abandonment issues include environmental and medical factors, genetics, and brain chemistry.

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the answer is b: the religion they practice.

here's why:

there were many different native american tribes and those with similar characteristics formed a main tribe or nation. each had its own language, religion and customs.