Final answer:
The Barbarian's HP is calculated by rolling a new hit die and adding it to their current HP at each level.
Step-by-step explanation:
The Barbarian's HP is calculated by rolling a new hit die and adding it to their current HP at each level.
For example, if a Barbarian has 10 HP at level 1 and levels up to level 2, they would roll a new hit die, let's say it results in a 6. Their new HP would be 10 + 6 = 16.
This process continues at each level, rolling a new hit die and adding it to the current HP to determine the Barbarian's new HP.