Final answer:
Ekwefi is terrified by the vague, fantastic figures she sees in the half-light of the moon, but what truly scares her is the lack of humanity in Chielo's chanting.
Step-by-step explanation:
Ekwefi is terrified by the vague, fantastic figures that appear in the half-light of the incipient moon. She sees shapes that dissolve and reform in new forms, including the image of a man climbing a palm tree in an unnatural way. However, what truly scares her is the lack of humanity she perceives in Chielo's possessed chanting.