Which of the following is incorrect regarding Proof of Work $($PoW$)$ and Proof of Stake $($PoS$)?$

Bitcoin is an example cryptocurrency that uses PoW.

In PoS, the amount of stake a validator has is related to its chance of getting chosen for tasks.

Compared to PoW, PoS consumes more energy, because more than one validators are chosen to finish a task.

The key idea of PoW is that blocks are only valid if they require enough computational power to produce.