Final answer:
Paul Nutt and Robert Backoff described the aspirational attribute of a vision as a powerful way to communicate an organization's future direction to inspire and mobilize stakeholders.
Step-by-step explanation:
According to Paul Nutt and Robert Backoff, the aspirational attribute of a vision communicates the future clearly through powerful imagery of where an organization is headed. This aspect is crucial as it not only lays a foundation for the direction of the organization but also serves to inspire and mobilize stakeholders towards a common goal. Companies and leaders use aspirational visions to articulate a compelling picture of the future that strives to inspire and engage their audience.