Final answer:
Asoka's policy of religious tolerance helped him unite his empire by promoting religious diversity and ensuring harmony among his subjects.
Step-by-step explanation:
Asoka's policy of religious tolerance helped him unite his empire by promoting religious diversity and ensuring harmony among his subjects. By respecting and honoring all faiths in his empire, Asoka won the support and loyalty of people from different religious backgrounds.
This policy led to a peaceful and united empire, as people were allowed to practice their own beliefs without fear of persecution or discrimination. This inclusiveness and his focus on the well-being of his subjects fostered unity across diverse cultures within his realm.