The process in which huge forces from inside Earth push rock upwards is called orogenesis or mountain building. It is the combination of tectonic forces and processes that lead to the formation of mountain ranges. Orogenesis occurs due to the collision or convergence of tectonic plates, which results in the deformation of the Earth's crust. This deformation can cause the uplift and folding of rock layers, leading to the formation of mountains. Orogenesis is a complex and long-term process that can take millions of years to complete.