Asteep slope, one that would be difficult to climb, can be recognized on a topographic map by looking for contour lines that -
a. have large numbers
b. are spaced closely together
c. are thicker than other lines
d. form v-shaped points

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?