Why do trolls die?

In mythology and folklore, trolls are often depicted as creatures that can die from various causes, such as exposure to sunlight, which can turn them to stone, or through combat with humans or other mythical beings. Their deaths can also symbolize the triumph of good over evil. Additionally, in modern fantasy, trolls might die from injuries, magic, or environmental factors, depending on the narrative context. Overall, the reasons for a troll's demise vary widely across different stories and interpretations.