• Yes, it is possible to remove a whole network block. There are occasions when simply a fraction of this online ledger needs to be taken into account. There are default choices and filters that can assist us in accomplishing this without exerting too much effort.
• The idea behind blockchain is to make data and transactions decentralised. This means that all of your information is stored indefinitely on a network of computers. Data can't be deleted or removed from all systems after it's been sent to a blockchain network.

Read More: How does bitcoin use blockchain?