Final answer:
The directive to ambulate a patient three times a day at specified times is an example of a nursing order, which outlines specific care actions for nursing staff.
Step-by-step explanation:
The instruction "Ambulate the patient three times a day at 0900, 1400, 1900 as tolerated" is an example of a nursing order. A nursing order is a directive by a healthcare professional that outlines specific care, treatment, or services that the nursing staff should provide to a patient. This particular order is about the frequency and timing of patient ambulation, which is consistent with a nursing activity that falls under the overall care plan for a patient. It's not a nursing diagnosis, which would detail the patient's health condition; nor is it a patient goal, which would be an expected outcome for the patient's health. Lastly, it isn't an evaluation, which would be an assessment of how the patient is responding to the treatment or intervention.