The Ethereum Virtual Machine (EVM) is a runtime environment for executing smart contracts on the Ethereum blockchain. It was designed to be a decentralized, secure, and sandboxed environment that can execute arbitrary code while maintaining consensus among all network nodes.
Gas refers to the fee, or pricing value, required to successfully conduct a transaction or execute a contract on the Ethereum blockchain platform.
Proof of Work (PoW) is a consensus algorithm used in blockchain technology to secure and validate transactions on the network.