Final answer:
Constructive forces including tectonic plate activity and volcanic activity shape various landforms on Earth, such as the forming of the Alps due to a collision of tectonic plates and volcanic eruptions creating islands.
Step-by-step explanation:
Constructive forces on Earth play a significant role in creating and shaping landforms such as mountains, plains, and islands. One of the primary constructive forces is tectonic plate activity, which can lead to the formation of mountains through processes such as the collision and compression of the Earth's crust leading to the buckling and folding of rocks. For instance, the formation of the Alps is attributed to the collision of the African and Eurasian plates.
In addition to tectonic activity, volcanic activity is also a major constructive force. Volcanic eruptions can build up new land by depositing lava that solidifies into rock, creating volcanic islands and mountain ranges. As the Earth's crust continues to move, these geologic structures can be altered further by earthquakes, additional volcanic activity, and other forms of tectonic movement.