Which of the numbered features is a pyroclastic flow? 
Definitions:
Identity
The sense of self, defined by individual characteristics, beliefs, values, and social relationships that distinguish a person.
Competence
The ability or skill to perform a task effectively or to a given standard, often developed through practice and learning.
Identity
The collection of characteristics, traits, and social roles that define an individual or group.
Career
A person's progress or general course of action through life or through a phase of life, as in some profession or undertaking.
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