Failing a class senior year?!!!!!!!!!!!!!?

Well why are you failing something you want to major in? is the class THAT hard? Do you go for extra help? In my high school you need to fulfill certain requirements before graduating. Like, 4 years of English, 3 years of math, 3 years of a science, 2 years of foreign language, 1 year of music, and 1 year of occupational ed. Also 20 hours a community service. We also had to have a minimum of 110 credits to get your diploma.