Final answer:
The correct spelling is 'circulatory'. This spelling follows the rule where the letter 'c' spells the [s] sound when followed by 'e', 'i', or 'y', helping to guide proper spelling.
Step-by-step explanation:
The correct spelling of the word in question is circulatory. The other spellings, 'circulatary' and 'circuletary', are incorrect. The word 'circulatory' refers to the circulatory system in biology, which is the system that moves blood throughout the body. Understanding the correct spelling can help ensure clear and precise communication, especially in an academic setting where spelling accuracy is important.
In English, certain spelling conventions help us determine the correct spelling of words. For instance, the letter 'c' often spells the [s] sound when it is followed by one of three letters: 'e', 'i', or 'y'. This is a useful rule that can aid in spelling similar words correctly.