What causes the hook of a golf ball?

Im not an idiot and i know that the face is obviously closed at impact. I think im coming across my body on the downswing, instead of releasing towards the target. Could it also be my weight is getting stuck on my backfoot? Also, are there any drills to let the club release to the target instead of the club coming across my body? and i dont know if this matters but someone mentioned my clubs being too short