Unlike the four scenes in the top two rows of the lithograph, the inclusion of the two scenes in the bottom row is best explained b. y ?

The technological innovations of the second industrial revolution

Explanation:

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mount st. helens in washington erupts, causing a massive avalanche and killing 57 people on this day in 1980. ash from the volcanic eruption fell as far away as minnesota. seismic activity at mount st. helens, which is 96 miles south of seattle, began on march 16.