Рисувати is to make a drawing, mostly technical. Рисунок is a sketch made by pencil in thin lines. When you take coloured markers to make a chair - what are you supposed to do, paint or draw? But it is still малювати.
in the dictionary hints of this exercise I learned that there is a way to say "know how", вмієте. I used this new word in place of "знаєте як' and was marked incorrect. Why would someone put a word in the dictionary hints and not accept it in the answer key?