Plate Tectonics, that would be the answer <span />
Physical processes are the natural forces that change earths features.
The greenhouse effect is the rise in temperature that the Earth experiences because certain gases in the atmosphere (water vapor, carbon dioxide, nitrous oxide, and methane, for example) trap energy from the sun. Normal warming is mostly caused by natural gases.
That would be the Himalayas and have the highest mountain range in the world.