Proof-of-History and Proof-of-Burn are not commonly used hybrid consensus mechanisms.

In a hybrid consensus mechanism that combines Proof-of-Work and Proof-of-Stake, Proof-of-Work is typically used for block validation.

Lower transaction fees are not necessarily a direct advantage of using a hybrid consensus mechanism.

In a hybrid consensus mechanism that combines Proof-of-Authority and Proof-of-Work, both Proof-of-Authority nodes and Proof-of-Work miners are responsible for validating blocks.

Lower energy consumption is not a potential challenge associated with using a hybrid consensus mechanism.

In a hybrid consensus mechanism that combines Proof-of-Stake and Proof-of-Elapsed-Time, both stake size and elapsed time are typically used to determine the block proposer.

Proof-of-Stake and Proof-of-Elapsed-Time hybrid consensus mechanisms are known for their fast block confirmation times.

In a hybrid consensus mechanism that combines Proof-of-Work and Proof-of-Authority, Proof-of-Authority nodes are responsible for validating transactions, proposing blocks, and maintaining the blockchain.

Lower transaction fees are not necessarily a direct benefit of using a hybrid consensus mechanism that combines Proof-of-Work and Proof-of-Stake.

In a hybrid consensus mechanism that combines Proof-of-Stake and Proof-of-Capacity, both stake size and capacity size are typically used to determine the block proposer.

Proof-of-Capacity and Proof-of-Space hybrid consensus mechanisms are known for their energy efficiency.

In a hybrid consensus mechanism that combines Proof-of-Work and Proof-of-Authority, Proof-of-Work miners are primarily responsible for proposing blocks.

Lower energy consumption is not a potential challenge associated with using a hybrid consensus mechanism that combines Proof-of-Work and Proof-of-Stake.

In a hybrid consensus mechanism that combines Proof-of-Stake and Proof-of-Elapsed-Time, Proof-of-Elapsed-Time is primarily responsible for proposing blocks.

Proof-of-Stake and Proof-of-Elapsed-Time hybrid consensus mechanisms are known for their high throughput.