Although termites evolved to be able to digest the most common molecule in the world, cellulose, they still had a problem. Cellulose is low in a vital nutrient, nitrogen. They have adopted a behavior that got them out of that hitch, cannibalism. See the attached article that tells how and also why you never see a dead termite in your Termitat!
https://insectessociaux.com/2019/10/24/in-a-cannibalistic-society-its-not-about-survival-its-all-about-recycling/
