How are mold and casts the same?

Molds and casts are both types of fossilization processes that preserve the shape and structure of organisms. A mold forms when an organism leaves an impression in sediment, while a cast is created when that impression is filled with minerals or sediments, resulting in a three-dimensional replica. Both processes provide valuable information about the organism's morphology and the environment in which it lived. Ultimately, they are interconnected stages in the fossilization process.