Context: Aspiration has varying significance in different languages. It is either allophonic or phonemic, and may be analyzed as an underlying consonant cluster.

Question: What has a different significance in various languages?
Answer: Aspiration

Question: What two forms can aspiration be in?
Answer: allophonic or phonemic

Question: What may be analyzed as an underlying symbol cluster?
Answer: Unanswerable

Question: Aspiration can differ in which two languages?
Answer: Unanswerable

Question: Unaspiration has varying significance in what?
Answer: Unanswerable

Question: What may be analyzed as an underlying phonemic cluster?
Answer: Unanswerable

Question: What is either allophonic or a cluster?
Answer: Unanswerable