Question : Commercial energy sources are primarily used for:

Option 1: Residential heating
  

Option 2: Agricultural irrigation
  

Option 3: Public transportation

Option 4: Industrial purposes

Question : Non-commercial energy sources are often used for:

Option 1: Industrial production
 

Option 2: Transportation
   

Option 3: Cooking and heating

Option 4: Electricity generation

Question : Non-commercial energy sources are often used for:

Option 1: Industrial production
 

Option 2: Transportation
   

Option 3: Cooking and heating

Option 4: Electricity generation

Question : Assertion: Commercial energy sources are widely used for industrial production and transportation.

Reason: Commercial energy sources are more cost-effective and have higher energy density compared to non-commercial sources.

Option 1: Both assertion and reason are correct, and the reason is the correct explanation of the assertion.
  

Option 2: Both assertion and reason are correct, but the reason is not the correct explanation of the assertion.
    

Option 3: Assertion is correct, but the reason is incorrect.

Option 4: Assertion is incorrect, but the reason is correct.

Question : Which non-conventional energy source depends on the sun's heat?

Option 1: Wind energy
   

Option 2: Tidal energy
    

Option 3: Geothermal energy

Option 4: Solar energy