The project team is not comfortable moving an expensive material. A third party is hired to move the material. This is an example of risk:

Risk transference involves shifting the responsibility and impact of a risk to a third party, often through contracts, insurance, or outsourcing. By hiring an external party to move the material, the project transfers the risk associated with that specific activity.

Risk sharing involves multiple parties taking on a portion of the risk, which is not what happened when a single third party was hired to take full responsibility for the task.

Risk avoidance means eliminating the threat entirely by changing the project plan or scope, not delegating the task to another entity.

Risk acceptance means acknowledging the risk and deciding not to take any action, which is contrary to hiring a third party to manage it.