Which of the following best describes an uncontrollable factor?

An uncontrollable factor is best described as an element that cannot be influenced or changed by the project team or management. These factors are external to the project and can include things like market conditions, regulatory changes, natural disasters, or economic shifts. Since these factors are beyond the team's control, they can significantly impact the project's outcomes, timelines, and overall success.

Understanding uncontrollable factors is crucial for effective project risk management. By identifying and acknowledging these elements, teams can create strategies to mitigate their effects or adapt project plans accordingly. This is why option B accurately describes uncontrollable factors, as it highlights their inherent nature of being unchangeable and their potential to impact project dynamics.