Which of the following encompasses "direct supervision" by a veterinarian?

Direct supervision by a veterinarian involves the veterinarian being physically present with the veterinary technician or assistant who is performing tasks. This means that the veterinarian is on-site and can oversee the procedures being carried out, ensuring that they adhere to the proper standards of care and that any immediate questions or concerns can be addressed in real time.

In this context, physical presence is crucial, as it allows for direct oversight and immediate intervention if needed. This ensures the safety and health of the patient and compliance with legal and ethical standards in veterinary practice. By being on-site, the veterinarian can provide guidance, make immediate adjustments to treatment plans, and ensure that the staff is following protocols correctly.

In contrast, the other scenarios do not fit the criteria for direct supervision as they lack real-time, on-site oversight. Over-the-phone instructions or written orders do not allow for the immediate, hands-on guidance that characterizes direct supervision.