subgenres

heavy metal have alot of  sungeres like black metal,alternative metal, cello metal and deatch metal, this is 4 of many subgenres, heavy metal is a subgenre of metal based in strong voices.

Black metal

deploy fast tempos and highly distortion guitar and is based in depresion 

Alternative metal

is a crossgenre with unconventional lyrics 

Cello metal

is caraacterized by using cellos with instuments like the violin.

Death metal

is caracterized by dark and morbid lyrics