Answer:
Brass: Trumpets, French (alto) horn, Trombone, Tuba
Woodwinds: Flute, Oboe, Clarinet, Oboe
Strings: Violins, Viola, Cello, Double Bass
Explanation:
When the object is far too large.
The difference is when you draw by memory you won't remember every tiny detail, and you make/draw it in your own way vs. having the object in front of you you can copy it almost exactly.
