We always walk on

Which teeth helps us grind the food finely as they have plat forms on them?

Never stop your cycle on a

Which sense organ helps us to breathe?

Which clothes catches fire easily? 

When we will be breathing out the air will be.

 When on the road, which lights should stop the vehicle?    

When we breathing out, which gas is let by the lungs?

Which is the respiratory organ?

Which of the following groups belong to the same system?