Question

All of these inventions aided society in improving in which economic area?

Answer 1

All of these inventions aided the society in improving in the PRODUCTIVITY AREA.
The inventions and use of machinery such as the cotton gin, water wheel and personal computers allowed people to make things more easily, thus, they help people in improving their productivity. Productivity refers to the relationship between the input and the output.

Answer 2

Productivity because all of these inventions aided society by helping to increase productivity. Their use allowed people to make more things and to make them more easily.