Which of the following resources under the ground of the Central Uplands physical region in Europe was critical in enabling the Industrial Revolution to diffuse there in the mid-1800s?

dude

Explanation:

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.