Question

2 the text describes the steps involved in 3d printing. what happens after a 3d printer starts squirting out thin layers of a material like plastic or metal? a the layers build up and harden, becoming a physical object. b the person operating the printer must assemble the object. c the 3d printer shuts down for a year to rest and restart. d the layers soften and melt into a plastic for architects to use.

Explanation:

To solve this, we analyze the 3D printing process. After a 3D printer squirts thin layers of material (like plastic/metal), the layers build up and harden to form a physical object. Option B is incorrect as 3D printing doesn't require manual assembly of the object after layer deposition. Option C is illogical (printer doesn't shut down for a year). Option D is wrong as layers harden, not soften and melt for reuse in that way. So the correct answer is A.

Answer:

A. The layers build up and harden, becoming a physical object.