Final answer:
Before arriving at the scene of a child who was bitten by a dog, you can begin to perform the step of determining whether the animal has been secured.
Step-by-step explanation:
Before arriving at the scene of a child who was bitten by a dog, you can begin to perform the step of determining whether the animal has been secured. This is important for the safety of everyone involved, as an unsecured animal can pose a threat to responders and bystanders. By determining whether the animal has been secured, you can take measures to ensure your own safety and that of the child.