Some examples would be the Silk trade or even their Food.
Landslides and avalanches are the most dramatic, sudden, and dangerous examples of earth materials moved by gravity. Landslides are sudden falls of rock, whereas avalanches are sudden falls of snow.
A wild plant growing where it is not wanted and in competition with cultivated plants.
Answer:
it should be the A. the crust
The answer is captaincies, hope it helps
