Problem of Html Overview question no 5-3

Question

In the final level of HTML overviews 3 rd questions answer is not only body tag. I used css in head tags and it always worked.

Answer 1

What is visible to a user is contained within the body tag. Any CSS in the head section would apply to elements contained within the body tag. If you just put some random CSS in the head section it wouldn't be visible to the user unless it applied to an element in the body, so I'd say the question/ answer are correct.