The most likely answer is that this would be an example of topical organization. Topical organization refers to an organization based on the different topics a text discusses. Problem-solution occurs when the first section of a text poses a question, and the second part presents an answer. Spatial organization refers to the description of items based on their location. Finally, compare and contrast refers to a text that compares ideas based on their characteristics.
A simile is used to compare her voice to a "cool, dark room in summer- peaceful, soothing, quiet". This helps let readers know that she is most likely very nurturing, caring, and a definite "motherly figure"
