What is meant by cavities in a solid part?

Cavities in a solid part refer to hollows or voids that are intentionally created within the material. These can serve various functional purposes, including allowing for other components or parts to fit inside the solid piece. This design feature is often utilized to optimize space or enhance functionality, facilitating assembly or reducing weight without compromising structural integrity.

In various manufacturing processes, cavities are strategically designed for these reasons, which can also lead to more efficient use of materials and manufacturing processes. While other options present valid considerations related to cavities, the primary intention behind creating hollows in parts is typically to accommodate additional components or to meet specific design criteria.