Question: What is the difference between Proof - of - Stake and Proof - of - Work? a . . PoW is

What is the difference between Proof−-of−-Stake and Proof−-of−-Work?
a..
PoW is Consensus algorithm while PoS is Consensus Mechanism
b..
PoW is used for security while PoS is used for privacy
c..
PoW used for data hiding while PoS is used for data cleaning
d..
PoW is used in financial transactions while PoS is used in computer network

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