Answer:
This is a simile.
The word 'like' makes it a simile instead of a metaphor. In this excerpt from "marigolds," The narrator is describing their mother's voice as calm and soothing by saying it sounds "like a cool, dark room in summer...." This adds to the overall characterization because the reader can better understand what the mother's voice sounds like. It creates a picture inside your head.
The correct answer is "used to show ownership"
It is called possessive because it shows who possesses something. It can be His, hers, their, or similar.
That type of paragraph is called sequence of events I believe. Have a lovely day :)