What are our "foundational" energy sources? Why are they used so much?

Energy sources are the sources or the fuels from which we get energy and without them there would be no energy and therefore no activity would take place.

Explanation:

Energy sources are for the most part types of powers utilized in the cutting edge world, either for warming, age of electrical vitality, or for different types of vitality transformation forms. Vitality assets can be generally grouped in three classes: sustainable, fossil, and atomic.

Energy sources are characterized into two gatherings-renewable and nonrenewable. Renewable and nonrenewable vitality can be changed over into optional vitality sources, for example, power and hydrogen.