b) Later that morning, the temperature in Spearfish had climbed to +12Oc. It then dropped by 32 degrees celsius in 27 minutes.

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.

answer; ///i believe the correct answer to the above question is; ///(drainage basin;

these include the fossil fuels, oil, natural gas, and coal and nuclear energy. hope this ! ^.^

-ella