Thanks Mr. Christopher your explaination about melody is really helpful,

And question about melody songs, I'm a srilankan tamil and use to hear indian tamil songs, they usually notate songs as melody songs which was realsed between 1985 - 1995, but i dont know why they use this term but mostly those songs has riffs and melodies included along with lyrics, but exactly i dont know the definition of melody songs?

Anyhow your explaination is helpful

Thanks

Charles