Which feature of AMI allows it to connect with various networks?

The feature of AMI that facilitates its connection with various networks is adapter flexibility. This is crucial because different networks may have varying protocols and message formats. Adapter flexibility allows AMI to integrate seamlessly with these diverse systems by using adapters tailored to specific communication protocols or standards. This ensures that AMI can effectively send and receive messages across different platforms, enabling communication and data exchange regardless of the underlying network architecture.

The other options, while relevant in their own contexts, do not specifically address the core functionality needed for connecting with various networks. Character encoding is more about how data is represented in bytes rather than how systems interact. Structured message formats define the layout and organization of the messages, which is important for data interpretation but does not directly facilitate network connectivity. Message composition involves the building of messages themselves, yet it does not influence the ability to connect to different networks. Thus, adapter flexibility is the key feature that enables AMI's interoperability across multiple networks.