What habitat do hippos live in? what do they eat? who are their predators? what threatens them in their natural habitat?

answer; /// during daylight hours the sun heats up the ground,and at night the clouds insulate the warmth making it warmer ;

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.