Final answer:
The EMS provider's FIRST action in rescuing a diving accident victim from a swimming pool is to remove the victim from the water and bring them to stable ground. CPR is ineffective in the water, so it is important to start CPR once the person is out of the water. Stabilizing the entire spine before removing the victim reduces the risk of further injury.
Step-by-step explanation:
The EMS provider's FIRST action in rescuing a diving accident victim from a swimming pool is to remove the victim from the water and bring them to stable ground. This is because CPR is ineffective in the water, and the goal is to start CPR as quickly as possible once the person is out of the water. It is important to stabilize the entire spine before removing the victim from the water to reduce the risk of further injury.