Explanation/Reference:
Explanation:
Proof of Stake has the same goal as proof of work-to validate transactions and achieve consensus in the chain-and it uses an algorithm but with a different process. With proof of stake, the creator of a new block
"is chosen in a deterministic way, depending on its wealth, also defined as a stake." Since in a proof of stake system, there is no block reward, but the miners, known as forgers, get the transaction fees.
Proponents of this shift, including Ethereum co-founder Buterin, like proof of stake for the energy and cost savings realized to get to a distributed form of consensus.
Reference: http://www.hl.co.uk/news/2018/2/16/a-brief-history-of-blockchain-technology-everyone-should- read