Original: The tongue is sticky because of the presence of glycoprotein-rich mucous, which both lubricates movement in and out of the snout and helps to catch ants and termites, which adhere to it.
Simplified: The tongue is sticky because of the presence of glycoprotein-rich mucous, which both lubricates movement in and out of the snout and helps to catch ants and termites, which stick to it.