Answer: Is option C
Explanation: Earth has impact craters
All of them are the current biggest sources of electrical energy.
3 of them will be explained.
------------------------
1) Natural gas:
it was the largest source, 38 % approx., of the USA electricity generation. It is used in steam turbines and gas turbines to generate electricity.
----------------------
2) Nuclear energy:
It was the source of 19% of the U.S. electricity generation in 2021. Nuclear power plants use steam turbines to produce electricity from fission.
---------------------
3) Coal power:
It was the 2nd.-largest energy source for US electricity generation in 2021.
Answer:
B. Experiments
Explanation:
conducting an experiment is an example of a research method while the other choices are not.
Hope I was able to help you!
The answer is C Had a military base to protect
