Bones grow and then your muscles grows according to your muscles.
True because paper can get lost and split on and lots of things can happen to it and you can loose it
There are three major classes of macronutrients: carbohydrates, lipids, and proteins. All three of these nutrients are needed in relatively large amounts AND they contain Calories (note the capital C which indicates kilocalories) which can be "burned" in your body to create energy for your body
In all of the cases that I've seen it is usually subtractive, but most of the time it depends on how old the child is.