Answer By Engineer....

क्यों चलती है पवन ?

because of evaporation

क्यों झूमे है गगन ?

because of earth's revolution

क्यों मचलता है मन ?

because of excessive respiration

न तुम जननो न हम ?

but i just gave all the answers

क्यों आती है बहार ?

because of change in season

क्यों लुटता है कारार ?

becuase of mental tension

क्यों होता है प्यार ?

because of fatal attraction

न तुम जानो न हम ?

like i said these are all science phenomena

क्यों गुम है हर दिशा ?

because u have lost the sense of direction

क्यों होता है नशा ?

because of drug addiction

क्यों आता है मज़ा?

because of food’s temptation

न तुम जानो न हम?

I think u r jealous from my intelligence