Which power source has been least developed

         Wind.

Explanation:      Wind power is the manipulation of air flow by wind turbines to produce the mechanical power to utilize electric generators. Wind power, as a choice to consuming fossil fuels, is abundant, renewable, broadly shared, neat, generates no greenhouse gas discharges through development, uses no water, and utilizes the small land. But this source has been, unfortunately, least developed by the developed nations.

it was on the rise and doing very well and would continue to do well until the great depression from 1929-1939

        i'm fairly sure that the correct answers are 2 and 3.

        i used both my knowledge of world history and the process of elimination to obtain these answers. option 1 cannot be a possible selection because the mandate of heaven belongs to ancient chinese philosophical belief. option 4 sounds like it would benefit the region than detriment it. however, both 2 and 3 explain a potential reason for what could have contributed to the fall of the roman empire.

      hope this ! if i were you, i'd get a second opinion, because i haven't taken this course for a year. best of luck!

***websites that me understand the curriculum better last year are and ***