Final answer:
Hydropower is an example of a natural source of power, as it uses the energy from moving water to generate electricity. Energy security is an aspect of national security in terms of access to affordable natural resources for industrial development. Fossil fuels and nuclear power have been the main sources of extrasomatic energy during the industrial phase.
Step-by-step explanation:
A natural source of power refers to the ability to generate electricity or mechanical power through natural resources without heavy processing or industrial intervention. Among the list provided, hydropower (E) is a natural source of power. It harnesses the energy from moving water, usually through dams or other forms of water containment, to create electricity. The original source of energy for both wind energy and hydropower is in fact the sun, as it drives the water cycle and wind patterns on Earth.
With respect to energy security, it's a vital element of national security since nations need available and affordable natural resources for industrial development and to maintain economic competitiveness. Non-state actors may derive their power from various factors, but they are not typically recognized as a source of power due to formal recognition by powerful international governmental organizations (IGOs).
In examining the sources of extrasomatic energy throughout the industrial phase of society, fossil fuels like coal, oil, and natural gas have played predominant roles. Alongside these, in some countries, nuclear power also contributes significantly to electricity generation.