Answer: A) Volcanic activity
Explanation: Volcanic activity which includes volcanic eruptions is a high temperature process through which rocks such as metamorphic rock melts through large scale earth movements and transportation its it's Magma materials into another location adding new rocks.
Volcanic activity is a geological process which add new rocks to the Earth,the other options involved breakdown processes which doesn't add new rocks.
Glacial activity involves the melting of ices due to high temperature.
Soil erosion is the movement of soil particles caused by mainly by water movement,air etc.
Weathering is the breakdown of rocks into small pieces.
Folding
The Himalayas, Andes, and the Alps are examples of folded mountains. They are called fold mountains because of the compressive forces involved in two tectonic plates colliding.
The highest one is Angel Falls
Why might a post classical civilization want to conquer Mesopotamia? It's fertile land provided the foundation for the first human civilizations and its access to the Persian Gulf and location between Europe, Asia, and Africa made it a center of trade.
