Death by Donut
So I didn't read the article but if I did, I bet I could rock a really great response here. Students can make the correlation choosing a "sugar" theme, search for it via Taack, and add an image or two to support their response. (CC image citation already included.) Quick, simple, and very visual. Lots of extras can be included, but not sure you want to allow too much time for a one-question response...
The comment stream at the bottom can be used to provide feedback from other groups about the Tackk presentation.
Have them include a special tag for your class (at right Tackk Options > Tackkboards) and it'll become easily searchable when it's made Public.