15 grams of liquid plastic or frozen in a physical change that increases the volume what can be about the plastic after the change

Idk what the answer is

It allowed for things to be produced much more quickly and efficiently 

The changes to agriculture in the united states since 1900 is that increased mechanization has increased food production, thereby increasing the need for labor. there has been an increased need for higher speeds of food production due the fact that the population in the united states continues to rise.