In Polkadot, XCM (Cross-Consensus Messaging) is a framework for parachain communication, allowing different blockchains to interact seamlessly. This system enables data and value transfers across varying consensus mechanisms, enhancing overall interoperability. Therefore, the correct answer to the question is B) A cross-consensus messaging format for parachain communication.
;
In Polkadot, XCM stands for Cross-Consensus Messaging format, which is used for communication between different parachains within the Polkadot ecosystem. This is a method designed specifically for enabling interoperability between parachains on the Polkadot network, allowing them to send and receive messages and data securely and efficiently. ;