21. Wha
t do you call the release of magma from the crater and flow out on the earth's surface? a.volcanic eruption b.earthquake c.tsunami d. explosion 22.What government agency issues warning and bulletins regarding volcanic activities being observed? a. DENR b. DSWD C. PAGASA d. PHIVOLCS 23. Volcanic eruptions can destroy properties and kill people. Which activity you need to do before a volcano erupts? a.Stay indoors. b.Stock some food and water. c. Remove ash from roof. d. Keep your food and water covered. 24. Which of these safety measures should be done during volcanic eruption b.Remove ash from roof. a.Evacuate if necessary. c.Run outside. d.Cover your nose with a mask when volcanic ash is present​