Question

The photograph shows the eruption of Mt. St. Helens on May 18, 1980.

The photograph shows a large ash cloud billowing and lava moving down the sides of the volcano.

Question
How can major volcanic eruptions like Mt. St. Helens cause increases in natural erosion up to many kilometers away from the volcano?

Answer options with 4 options
A.
During some eruptions, pumice falls to the surface, causing large impact craters to form.

B.
During some eruptions, glaciers on the mountain move faster, causing U-shaped valleys to form.

C.
During some eruptions, snow and ice melt on the mountain, causing greater river flows downstream.

D.
During some eruptions, new layers of sediment form as falling volcanic ash settles back to the surface.

Answer 1

[AI-generated answer — Bot GPT 3.5]

C. During some eruptions, snow and ice melt on the mountain, causing greater river flows downstream.