What are Cosmos SDK and Tendermint, and how do they work together?

The Cosmos SDK is a modular framework for building application-specific blockchains (zones) within the Cosmos ecosystem. Tendermint is a Byzantine Fault Tolerant (BFT) consensus engine used by Cosmos SDK-based chains to achieve consensus among validators. Together, the Cosmos SDK and Tendermint enable developers to build secure and scalable blockchains with customizable features and governance mechanisms.