What force is responsible for compressing stars into a spherical shape?
a)Nuclear fusion
b)Gravity
c)Energy
d)Forces

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.

italy:

classic, nostalgic, romantic and beautiful. no place better than italy or sicily.