Drag and drop words onto images

Points to note

the image may range from a simple diagram, as here, to a complex photographic image
'drop boxes' can be placed anywhere on the image
there are a variety of available generic feedback responses, for example counting the number of right or wrong answers, with the option of floating wrong answers back to their original position
drag and drop questions are keyboard accessible; use 'Tab' to move around the drop areas and 'space' to cycle through the options.