Answer:
The various types of reliefs on the planet are the result of a series of modeling agents that can be internal or external. In the case of folds and failures, they are internal or endogenous agents, arising from movements in the lithospheric plates.
The folds, also called folding, are constituted by gigantic pressures that happen horizontally, exerting a great force on rocks of more fragile compositions, such as sedimentary ones, this phenomenon promotes the wrinkling of the relief. We have several examples in the world of mountain ranges that have emerged as a result of folding and folding, such as the Himalayan mountain range in Asia; the Alps in Europe and the Andes in South America.
The faults, or failures, are formed from movements caused by enormous pressures that succeed each other vertically and horizontally, exerting a great force on more solid and rigid rocks, such as crystalline ones. In the execution of the phenomenon, they form ruptures or cracks in the extensions of the rocks. This causes the slip between the rocks. Such movements are responsible for the emergence of cliffs and valleys. Faults can also arise in places where lithospheric plate encounters occur.