I believe it has to do with the color of their moccasins...they typically dyed the soles of the moccasins black
Answer: to a deep or far-reaching extent
Explanation:I asked my teacher.
Preposition is a word that indicates location so with that said....
pocket: I put the keys in my pocket (location)
bed: I put my shirt on my bed (location)
cushions: I set the vase down on the cushion (location?)
afternoon is a time. so the answer is afternoon