What type of volcano alternates between gentle and violent eruptions?

The answer to this question is composite volcano
The one that causes this alternation within the composite volcano is the difference in layers inside the volcano.
The different in layers create a difference in pressure from one layer to another, which resulted in different magnitude between each eruption.

Since the time there were born it depends, there's fun violence, abuse, r@pe, kidnappings, threats, hostages ect.