What’s the main reason for farming for LDCs?

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.

the correct answer is amazon river

heat from the core of the earth causes convection currents to occur in the mantle. these currents slowly move the crust around.