Which feature enables this part of the turtle to function as it does?

Please provide me with the part of the turtle you are referring to! I need more context to understand what feature you are asking about.

For example, you could say:

* "What feature enables the turtle's shell to function as it does?"

* "What feature enables the turtle's flippers to function as they do?"

* "What feature enables the turtle's beak to function as it does?"

Once you provide me with the specific part of the turtle, I can tell you about the feature that allows it to work.