On what basis would you classify energy sources as (a) renewable and non-renewable ? (b) exhaustible and inexhaustible ? Are the options given in (a) and (b) the same ?

(a) Renewable sources : The sources of energy which are being produced continuously in nature and are inexhaustible, are called renewable sources of energy. The energy derived from flowing water, wind, tides, ocean waves, or wood are examples of energy from such sources. Non-renewable sources : These sources are produced over million of years under special conditions. Once consumed, these are not replaceable for a very long time. Fossil fuels like coal, petroleum and natural gas are non-renewable sources. (b) Exhaustible sources are non-renewable sources, while inexhaustible sources are renewable sources. Yes, the options given in (a) and (b) are the same.