Question

I have to write a detailed description of HARMONY,DISSONANCE + COUNTER MELODY.
please help i don't know what to write

Try the following links:
http://en.wikipedia.org/wiki/Harmony

http://en.wikipedia.org/wiki/Counter-melodies

http://www.google.com/search?hl=en&safe=off&as_qdr=all&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=+%22Counter-melody%22&spell=1

http://www.google.com/search?hl=en&lr=&safe=off&as_qdr=all&q=DISSONANCE++music&btnG=Search