Am I lazy or just passionate?

I had the same thing in high school. I hated physics. I got good grades in every class except physics and to this day don't understand why. Try and spend a little bit more time in that class and talk to your teacher about it. He or she might be able to shed some light on why you are doing average on that class and not, better than average like your other classes.

You really need to go to class. If you want a to go to a good college, stop skipping class. You do not want to lose your dreams. If you don't like the class, do it. This is your last year and you have many classes ahead of you.

I think you're just a bit lazy, using photography as an excuse to avoid other work. If you truly are passionate, then you wouldn't let anything hold back your photography, including one bad grade.

you won't get anywhere without great credentials and you won't get great credentials with bad grades. sounds like you just don't like the class. if you really want to be a successful photographer though you've got to push through this one class so you don't end up messing up your future.

Well get used to it, when you hit college there are many classes your going to hate , several your going to love. Deal with it now.