Answer:
is this a multiple choice question?
Explanation:
The 9/11 attacks on America made people fearful of their safety. On the other hand, it united people.
Supervision of the country and city Government would be the correct answer to your question.
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.
Thomas saint created the sewing machine in 1790
