These should be the correct answer
This is a geologic event that occurs when tectonic plates are displaced violently. This is when lava, ash, and various gases are expelled from a volcanic vent or fissure. This is one type of igneous rock that has erupted from volcanoes or seafloor fissures, or freeze at shallow depths.
I’m not too sure but I would try oxidation or mass movement
The Pampas<span> of South America are a grassland biome. </span>They<span> are flat, fertile plains that covers an area of 300,000 sq. miles or 777,000 square kilometers, from the Atlantic Ocean to the Andes Mountains. It is found primarily in Argentina and extends into Uruguay.</span>