Question

in blockchain the computer resources are highly essential for :

Answer 1

The fields which gave birth to the concept of Block chain are Cryptography, Distributed Computing, and Mechanism Design.

A block chain is basically a "digital ledger in which transactions made in bitcoin or another crypto-currency are recorded chronologically and publicly."

So in regard to the use of computer resources it is quite obvious that since this all is digitally related, all the dealings are related to technology, the need for computer resources will be important.

To be able to make sure that such currencies and their dealings exist, computer resources are highly important to be able to support their designing, their manufacture, to be able to publically display them, etc.