Where does the overwhelming amount of seismic activity occur on the earth's surface

a substance in a physical state in which it does not resist change of shape and will expand indefinitely to fill any container.

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hope this !

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.