Which of the following is most responsible for el nino?
a. usually cold water in the atlantic causes an increase in wind activity
b. calming down of trade winds in the pacific, which leads to the buildup of warm water
c. death of plankton and fish in northern hemispheres
d. disruption of the gulf stream

When volcanoes erupt, magma (hot, molten rock) rises toward the surface of the earth. as magma cools, solid rock forms. this rock contains substances from the interior of the earth. which of the following natural resources is likely to be plentiful near subduction zones where volcanic activity has occurred in the past?