Final answer:
The EMT-B's responsibility when caring for a patient with a behavioral emergency is to defuse and control the situation and safely transport the patient.
Step-by-step explanation:
The EMT-B's responsibility when caring for a patient with a behavioral emergency is to defuse and control the situation and safely transport the patient. Their priority is to ensure the safety of both themselves and the patient. They should use their training to assess the situation, calm the patient if possible, and safely transport them to a medical facility for further evaluation and care.