All of the following are ways to increase economic development except:
a. making better use of natural resources
b. investing back into the economy
c. using foreign aid
d. agricultural collectivization

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?