Answer:
a. Spiritual
Step-by-step explanation:
Spirituality is generally an important aspect of all Native American's culture, Including Cherokee.
The Cherokee believe that The physical world where humans conduct their day to day activities is not separated from the spiritual world. So, even after one of their tribe members die, they can still somehow influence the well being of the tribes.
Not only that, Cherokee also believe in ancient spirits that might intervene with the tribes' sickness / healing, balance/order, and natural disaster.