Answer:
changes due to earthquakes:
A. Earthquakes can do significant damage to buildings, bridges, pipelines, railways, embankments, dams, and other structures.
B. Earthquakes often cause dramatic changes at Earth's surface. In addition to the ground movements, other surface effects include changes in the flow of groundwater, landslides, and mudflows.
Changes due to volcanic eruptions:
a.Volcanoes can impact climate change.
b.have a cooling effect, because they (or the substances they cause) reflect sunlight away from the earth.
