Final answer:
The statement is false. Volcanic activity can create mountains, as seen with mountain ranges such as the ones in Hawaii, formed by hotspots and plate boundaries. However, not all volcanic eruptions lead to mountain formation, with some resulting in lava plains.
Step-by-step explanation:
The statement "Volcanic activity does not create mountains" is false. Volcanic activity is a significant geological process by which mountains can be formed.
Most mountain ranges are the product of tectonic plates' movements, which include volcanic activity. This occurs above mantle "hot spots" and at the boundaries between Earth's crustal plates, such as mid-ocean ridges, subduction zones, and regions where continental plates collide. The Hawaiian Islands are a prime example, where volcanic activity has resulted in the creation of some of the world's largest mountains, like Mauna Kea.
However, it's important to note that not all volcanic eruptions lead to mountain formation. Rapid lava flows from long cracks can spread out and form extensive lava plains instead of mountains. The method of eruption and the geological conditions significantly influence the landscape that is formed as a result of volcanic activity.