The hot/cold question didn't specify what, exactly, was at that temperature, but any way you look at it, freezing cold is the only option for most of human existence. You can bundle up if it's freezing cold outside. You'd die if it were hot enough to boil water. You need boiling hot temperatures to cook food, but you'd badly burn yourself if you consumed it before it cooled. On the other hand, we eat frozen food all the time.
The height question is kind of odd. If most people don't pick average, I'll be surprised.
I have a complaint about this channel now. I didn't get to see the results of the questions I didn't answer. I don't eat breakfast, so I couldn't answer the teeth brushing question, and I don't like to watch any sports on TV, so I didn't answer that one. That doesn't mean I wouldn't find the results interesting, though, Nintendo!