Final answer:
The police officer has the authority to authorize the use of deadly force.
Step-by-step explanation:
The individual who has the authority to authorize the use of deadly force among the given options is 1) Police officer.
A police officer is granted the legal authority to use deadly force in certain situations, such as self-defense or protecting others from imminent harm. This authority is backed by laws and regulations that define when and under what circumstances a police officer can use deadly force.
For example, if a police officer encounters a dangerous criminal who poses a threat to the officer or others and less lethal means of apprehension have proven ineffective, the officer may be authorized to use deadly force as a last resort.