The energy that can be renewed again and again is known as renewable source of energy. Example : water, sunlight, wind et cetera.
The energy cannot be created again,once destroyed is known as non renewable source of energy.
The energy obtained from coal is non-renewable.
Energy obtained from burning plant waste is renewable
Energy obtained from water spring inside the earth is renewable.
Energy obtained from natural gas is non renewable.
<span>Altruism is a selfless behavior so the animal would behave that way because it's intention is to put others before itself.
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An absorption line will appear in a spectrum if an absorbing material is placed between a source and the observer.
