Question

read the passage. then answer the question.
3d printers
3d printers can replicate simple objects. they make copies of things such as screwdrivers and drinking cups, things that you can hold and use. you can even take a flower vase and make another one.
3d printers dont print with ink on paper. instead, they use molten plastic. the plastic is heated until it is melted, and very soft, and then it is poured into the shape of the thing being printed. when the hot plastic cools, you have your printed object!
based on the passage, which is the best definition for the word molten?
a made liquid by cooling
b made to be like gas by heating
c made solid or very hard by cooling
d made liquid or very soft by heating

Explanation:

The passage says "The plastic is heated until it is melted, and very soft". So, molten means made liquid or very soft by heating.

Answer:

D. made liquid or very soft by heating