Give an example of personification.

Personification is a literary device where human qualities or characteristics are attributed to animals, inanimate objects, or abstract ideas. The choice where "the sun smiled down on us" illustrates personification effectively. In this example, the sun, which is an inanimate object, is described as if it possesses the human ability to smile. This imagery evokes a sense of warmth and friendliness associated with sunshine, enhancing the emotional connection to the scene being described.

The other options lack this clear human attribute. The curtain merely moving in the wind is a description of its movement without any human-like quality. The cat purring softly describes a natural behavior of an animal without attributing human traits. Similarly, the computer freezing is a technical issue and does not imply any human characteristics or emotions. Thus, the choice of the sun smiling demonstrates personification by giving it a human action, creating a vivid and relatable image for the reader.