Final answer:
The final stable syllable to add to "permis" is "sion," forming the word "permission." Adding "tion" does not create a commonly recognized English word (option 1).
Step-by-step explanation:
The word "permis" can have either final stable syllable "sion" or "tion" added to it to form different words. If you add "sion" to "permis", you get "permission," which is a noun meaning consent or the act of allowing someone to do something. On the other hand, adding "tion" to "permis" does not result in a commonly used English word. Therefore, the correct final stable syllable to add to "permis" to form a commonly used English word is "sion," giving us "permission."
Hence, the answer is option 1.