Here are the answers to your questions:
Question 1: A) Which phrase defines an appositive?
Response: a word or group of words that renames a noun
Question 2: A) How is ownership shown for singular nouns?
Response: add -'s to the noun
Question 3: A) Use the sentence to answer the question. We are excited for summer vacation, for we have plans to visit several national parks. Which comma rule is used in the sentence?
Response: compound sentence
Question 4: A) Use the sentence to answer the question. Last week, Brian read The Fall of the House of Usher before his shift at the ice cream shop. Which sentence revision uses quotation marks correctly?
Response: Last week, Brian read “The Fall of the House of Usher” before his shift at the ice cream shop.
Feel free to ask if you need any further assistance!