Given a scientific question, generate a correct answer to it.
Q: What composition determines both eruption type and volcano type?
A: 
magma
Given a scientific question, generate a correct answer to it.
Q: What composition determines both eruption type and volcano type?
A: 
user
magma
assistant
Given a scientific question, generate a correct answer to it.
Q: What composition determines both eruption type and volcano type?
A: 
magma