Afold in rock that bends upward into an arch is called a?

d. new methods of assembly are introduced.

explanation:

this allows for the goods to be made on a larger scale. not faster because now it is shown to be made better, hence the greater productivity in the question. it is calling for something new to be introduced.

the correct answer would be true friction causes the faults to slip or collide

the answer is the last option or letter d)