Answer:
9. True
10. True
11. True
Explanation:
9. Have possibility if flow down the lava and can change the earth surface.This is dangerous if possible.
10. Yes, acid rain is so dangerous anytime and anywhere. Making this is dangerous if you didn't know how to.
11. Yes, this is dangerous for all people who near in this volcano. Have no good effect because like in no.9 maybe or possibility to change the earth surface.
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