Final answer:
Modeling is an additive process in sculpture where material is built up to create form. The artist uses malleable substances such as clay or plastic to shape the sculpture by adding material until the desired form is achieved.
Step-by-step explanation:
Modeling is an additive process in sculpture, where material is built up to create form. The artist uses malleable substances such as clay or plastic to shape the sculpture, adding material until the desired form is achieved. This method allows for the artist to push, pull, pinch, carve, or pour material into place, creating a three-dimensional work of art. Modeling can also involve removing material, making it a preliminary step in the casting method.