Question

how did kuba artists decorate their ngady amawaash masks?
with carved, repeating lines that represent scarification
with bold, geometric patterns in contrasting colors
with wooden beads that symbolize the forces of nature

Explanation:

Kuba artists are known for using carved, repeating lines on their ngady amawaash masks to represent scarification, which is a significant cultural practice. Bold geometric patterns in contrasting colors are more associated with other African art forms like some from the Dan or Yoruba. Wooden beads symbolizing nature forces are not a typical decoration for these masks.

Answer:

with carved, repeating lines that represent scarification