Question

a gautam

1. how it works

you are probably aware of printers that print more than paper. such
printers are three - dimensional printers. in short, the process is called
3d printing. 3d printing is also known as additive printing technology.
it creates complex objects of endless variety. such a printer prints an
object as thousands of thin layers of material. each layer is accurately
placed and added one after another. these layers adhere to each
other. then, the layers that are stuck together solidify.

1. the advantages

3d printing is not only very accurate but also a lot faster than
many manufacturing processes. it is cheaper and faster to 3d print
many complicated objects than to try to produce them in factories.
one can print objects as needed without worrying about mass - producing to save money and pay for
storage. other ways to mass - produce are casting and welding. however, one cant be as creative in
designing shapes in casting and welding as in 3d printing. in addition, 3d printing makes printing
a prototype for testing much easier. a prototype is the first model of something from which other forms are
made or developed.

in paragraph 1, the word adhere means
a to become solid
b to be made simpler
c to stick or stay attached to

Explanation:

The context mentions that layers are added one after another and then "the layers that are stuck together solidify". The word "adhere" is used right before this description of layers sticking. "Adhere" means to stick or stay attached to something. Option A ("to become solid") refers to the later process of solidifying, not the meaning of "adhere". Option B ("to be made simpler") has no relation to the context of layers in 3D printing.

Answer:

C. to stick or stay attached to