Final answer:
Without a clear visual depiction, it is not possible to identify which knot is being described, as the provided details are not uniquely characteristic of any specific knot mentioned in the options.
Step-by-step explanation:
Based on the description provided, it is not possible to accurately determine which knot is being referred to as the unique features are not entirely distinctive of a specific knot. However, in general, the bowline is known for its fixed loop at the end, the becket/sheet bend is used to join two ropes of unequal sizes, the clove hitch is recognized for securing a rope to a post, and the figure eight knot prevents the end of a rope from running out of retaining devices. It is essential to have a clear and precise depiction of the knot to correctly identify it. The decision cannot be made based on the description of 'a little cleft that's been carved in horizontally' or a 'tied belt that hangs down' without visual confirmation.