The sentence that contains a subordinating connection is D, the one that reads as follows: "as a result, we bought a cooler and made sandwiches for our trip back home". A subordinating connection, also known as subordinating conjunction, is a word or phrase that links a dependent clause to an independent clause. "As a result" is a subordinating conjunction that is used to introduce cause and effect relationships.
The tone of a poem reveals the speaker's attitude towards the subject of the poem and towards its audience. In poems, the tone is indicated by using figures of speech, rhyme, sentence structure, and imagery.