3D printing uses computer-aided design (CAD) to create three-dimensional objects through a layering method. Sometimes referred to as additive manufacturing, 3D printing involves layering materials, like plastics, composites or bio-materials to create objects that range in shape, size, rigidity and color.
Answer:
B
Explanation: i am trying to get points
Answer:
Spartan political system was a combination of monarchy (kings), oligarchy (Gerousia) and democracy (ephoroi, ephors). Oligarchy– Sparta always had two kings, the state was ruled by two hereditary kings of the Agiad and Eurypontid families (probably the two gens had great merits in the conquest of Laconia).
I would say the answer is C because countries need to protect their own food from intruders
