The answer is A.
Rockefeller worked with oil, Vanderbilt did the railroads, Carnegie was leader of the American steel industry, and Astor did fur trade and invested in real estate.
The two most important factors in climate are temperature and precipitation.
Depends how you define nature.
The solar system is made by nature.(the big bang)
Mountains are made by nature (movement of the plates everything is located on)
Vulcanos (eruptions spit up all the earth and made these mountain like structures
Answer:
I think it's the Scientific Method
Explanation: