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Witch of the following volcano hazards is made up of rocky particles about the size of a grain of sand

What can you learn about precipitation levels in south america from this map? brazil is experiencing a drought.it rains more in higher altitudes.peru received the highest level of rain.venezuela got less than 25 cm of rain. 

Which city area has the most accessible oil reserves a) caspian sea b) siberia c)arctic coast d)lake baikal