Final answer:
Volcanic eruptions and earthquakes are the two geomorphic processes with the quickest impact on landmasses.
Step-by-step explanation:
The two geomorphic processes that have the quickest impact on landmasses are volcanic eruptions and earthquakes.
Volcanic eruptions occur when molten rock, ash, and gases are expelled from a volcano, causing rapid changes to the surrounding land. These eruptions can generate new landforms, such as volcanic mountains and lava flows.
Earthquakes are associated with the movement of tectonic plates, resulting in the sudden release of energy that causes the ground to shake. They can trigger landslides, create new fault lines, and lead to the formation of mountains or valleys.
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