Activating Interchain Messaging

Avalanche offers native interoperability between all Avalanche L1s. You will be asked if you want to connect your blockchain with other blockchains or the C-Chain. Select the first option to enable your blockchain to interoperate with other blockchains and the C-Chain. You can simply activate it by selecting Yes.

? Do you want to connect your blockchain with other blockchains or the C-Chain?: 
  ▸ Yes, I want to enable my blockchain to interoperate with other blockchains and the C-Chain
    No, I want to run my blockchain isolated
    Explain the difference

This will result in the warp precompile being activated and the Interchain Messaging contracts to be deployed to your Avalanche L1. Furthermore, if you deploy it on a local network, Avalanche CLI will also run a relayer for you. You will can learn more about how the interoperability work in the course Avalanche Interchain Messaging.