Maybe not an element...
Its sort of like its own little mini culture. Not every hip hop head plays ball, and not every baller is a hip hop head. Although most are.. but not real hip hop. Some rappers play, sort of.. and some players rap (hot sauce
) but I dont know. It couldnt be considered an element.
But the real secret fifth element is beatboxing. Think about it. Its a huge part of hip hop..