The correct answer is answer B ("The belief that spirits exist throughout nature").
Animism refers to the belief that all objects, places and physical existence are transcended by a spiritual presence. Indigenous people went as far as considering that not only humans, animals and material manifestations have a soul, but also words and natural phenomena such as fire, rain or the wind each have a distinct soul. The word animism comes from the latin "anima", which translates to spirit, breath or life.
Hope this helps!
