The setting contributes the fact that because the setting is rainy and in a home, it allows the writer to write that Porphyria is coming in from the rain, an extremely open scene, as coming in from the rain represents coming after all the hardship of running in the rain.
An adverb clause is a group of words that function as an adverb. For example: "Unless you run fast, you will miss your bus." The bold words are part of the adverb clause.
In "The Fish I Didn't Catch," he "describes an autobiographical incident" in order to persuade his audience of the wisdom of his uncle's advice, but he does other things as well.