Here are the answers to your questions based on the information provided:
Question 1: Which of the following empires did NOT trade salt?
Answer: Zimbabwe
Question 2: Which king made Christianity the official religion of Auxum?
Answer: Ezana
Question 3: Which of the following was an important city of the Mali Empire?
Answer: Timbuktu
Question 4: Which of the following was NOT located in West Africa?
Answer: Zimbabwe
Question 5: According to the table, which of the following was the main reason that Ghana grew rich?
Answer: They taxed traders who passed through the empire.