What year did disco hit the airwaves and what show was it? pl answer fastt

Natural minor half steps between scale degrees 3 and 4; 7 and 8 harmonic minor half steps between scale degrees 2 and 3; 5 and 6 ascending melodic minor half steps between scale degrees 2 and 3; 5 and 6; 7 and 8 major half steps between scale degrees 2 and 3; 7 and 8

What does bts stand for? what is the importance of bts? who first started it?

Where does the wood yiri come from? i know it is somewhere in africa but a specific location, . worth 15 points hurry