$1$

Proof$-$of$-$work

$2$

Immutable

$3$

Ledger

$4$

Distributed

Hash

$6$

Proof$-$of$-$stake

computing

$5$

Blockchain

$8$

Blocks

$9$

Genesis block

$7$

Blockchain

Match each of the options above to the items below.

Processes and manages algorithms across many machines in a computing environment

A requirement to define an expensive computer calculation, also called mining, that needs to be performed in order to create a new group of trustless transactions $($blocks$)$ on the distributed ledger or blockchain