The major landform formed by tectonic activity is a mountain. Mountains often arise as a result of tectonic plate collisions, creating structural uplift and deformation. This geological process involves the convergence, divergence, or sliding past of tectonic plates, which can lead to the formation of mountain ranges such as the Himalayas and the Rockies. The diverse landscape of mountains is characterized by varied elevations, rugged terrains, and an array of ecosystems. Mountains significantly influence climate patterns, biodiversity, and human activities, showcasing their importance in Earth's geological history.