10. where is methane produced?
a in the exhaust systems of automobiles
ob in the heating systems of homes and other buildings
c in the digestive systems of livestock and certain bacteria
d in the production systems of coal-burning power plants

in the production systems of coal-burning power plants

answer >   yes we do, women; have three holes, urethral opening(pee hole, vagina, and the women pee/girls pee out of the urethra like the men do; only they have a single opening to pee/ejaculate.   (sorry if i'm too forward with this, but this is for a biology class, isn't it? )

hope that !         : )