Final answer:
Deformation of rocks depends on factors such as stress, rock type, depth, and duration of stress, resulting in either brittle or ductile behavior.
Step-by-step explanation:
Deformation of rocks can occur in either a brittle or a ductile manner, depending on various factors.
Brittle deformation occurs when rocks break or fracture under stress. This behavior is common near the Earth's surface and happens quickly, like a glass breaking when hit with a hammer.
Ductile deformation occurs when rocks bend or flow under stress. This behavior is common at depth and happens slowly over time, like the bending of a piece of metal. It depends on factors such as the type of stress, type of rock, depth, pressure and temperature conditions, and the duration of stress.