Final answer:
Leaders play a crucial role in sustaining organizational culture, but may not always have the power to change it entirely.
Step-by-step explanation:
Leaders play a crucial role in sustaining organizational culture by setting an example, establishing norms and values, and promoting the desired behaviors. However, they may not always have the power to change the culture entirely, especially if it is deeply ingrained and supported by the employees. While leaders can influence and shape the culture, it is ultimately the collective actions and beliefs of the entire organization that determine the culture's sustainability.