Describe the rhetorical technique that Achebe uses in the paragraph that begins, "The priestess' voice was already growing faint in the distance." Why does Achebe use this technique?

An example of this is a rhetorical question within the paragraph. As Ekwefi runs in the darkness with Ezinma on her back. Ekwefi wonders, "How could she go so fast with Ezinma on her back?" We know how, because the child is everything to her and this darkness and fear will not stop her. He uses this simply to highten the intensity of the scene.