Final answer:
The suitable task for a UAP is Assisting with ambulation, as they are not qualified to administer medications, create nursing care plans, or take vital signs, which are tasks that require licensed nursing staff.
Step-by-step explanation:
The appropriate task that a unlicensed assistive person (UAP) can complete under the direct supervision of a registered nurse on a busy telemetry floor is Assisting with ambulation. UAPs, being unlicensed, are not qualified to administer medications, create nursing care plans, or perform any kind of clinical assessment, such as taking vital signs or patient assessments that require professional nursing judgment. Instead, their role is generally limited to providing basic care and support tasks, such as helping patients with walking, moving, or other activities of daily living. Tasks that involve a higher level of skill, such as those related to clinical assessment or treatment, must be performed by licensed nursing staff.