For most of human history,and in developing countries today,the major source of energy has been
A)natural gas.
B)oil.
C)wind.
D)muscle power.

Question

Quizplus · Accepted Answer

For most of human history, muscle power has been the major source of energy. This includes physical labor and animal power used for everything from agriculture to transportation. In developing countries today, muscle power is still a significant source of energy for daily activities. Natural gas and oil are relatively recent sources of energy, and wind power is not commonly used in most developing countries.

For Most of Human History,and in Developing Countries Today,the Major