Which of the following was a divine transformation that played a key role in several myths?

The option regarding transformation into animals is correct as it represents a significant theme in many myths across various cultures. In Greek mythology, for instance, the gods frequently transformed themselves or others into animals as a means of punishment, disguise, or escape. A notable example is the story of Zeus transforming into a swan or a bull to approach women he desired.

This motif highlights the fluidity of identities and the power dynamics between humans and divine beings. Additionally, these transformations symbolize the connection between humans and nature, showcasing how divine intervention can alter one's existence or reality.

While transformations into trees, locations, and other humans do occur in mythology, they are less prevalent as central themes driving the narratives compared to animal transformations. Such changes certainly can have significant symbolic meaning, but the transformation into animals serves as a more frequent and recognizable device that underlines the thematic elements of metamorphosis and divine interaction in myths.