Which of the following materials can be cast in molds or sculpted by hand tools?

Casting and hand sculpting are techniques that involve shaping materials into forms or structures, typically using molds or tools. Glass is a material that can be manipulated in ways similar to casting. It can be melted and poured into molds to create specific shapes, or it can be sculpted as it cools and hardens, allowing artisans to create intricate designs.

When glass is heated to its melting point, it becomes pliable and can be poured into molds, allowing for the creation of detailed and complex forms. Additionally, glass can also be shaped through processes like lampworking or glassblowing, where tools are used to sculpt it into desired shapes while it is still at high temperatures.

Considering the other materials listed: while plastic can be molded and shaped, it does not typically involve the same casting process as glass. Metals can be cast but often require additional equipment and processes such as welding or forging rather than being sculpted by hand. Paper, although it can be manipulated and shaped (through techniques like papermaking or origami), does not traditionally involve the casting process associated with molds.

Therefore, glass stands out as the material that best fits the criteria of being both cast in molds and sculpted by hand tools, making it the correct choice in