Generally, yes it is true that store brands are cheaper than national brands. This is because they are often copies of existing brands using lower quality packaging/products.
Neck and head, I believe. The vertebral column is your spine
I think the diet that helps prevent cancer is a diet high in calcium and low in sugar because if it was a diet high in protein u would have diabetes and other bad things. And if it was a diet high n fiber and low in saturated fat it wouldn't be low it would be really high and would probably have cancer that is why I a say c. the last one.