Read the text. The figure of speech is shown in bold.

Thick swales of swamp grass rippled. Mud turtles napped in the sun. The world was so calm that Omakayas could hear herself blink. Only the sweet call of a solitary white throated sparrow pierced the cool of the woods beyond.
From Louise Erdrich, The Birchbark House. Copyright 1999 by Louise Erdrich