Final answer:
The recommended Step 1 in REA business process level modeling is to identify the economic exchange events that form the core of the business process.
Step-by-step explanation:
The recommended Step 1 in REA business process level modeling is to Identify the economic exchange events that form the core of the business process. This step involves identifying the key events that occur within the business process and have an impact on the exchange of goods or services. By identifying these events, the model can focus on the most critical activities in the process.