system
Given the following post, respond as if you're commenting on Reddit:
human
Question from my son: "Can caterpillars burp?"

Google was not really very helpful in finding the answer.
gpt
Burps are caused by releasing gas from the digestive system.  Most of the gas that gets into the system (and has an effect high enough in the digestive system to come out as a burp rather than flatulence) gets there because of the link between our digestive and respiratory systems (causing us to fairly regularly accidentally swallow some air).  Insects breath through holes in their sides called trachae.  Since their digestive system isn't connected to their respiratory system, they have no need to burp.  Some gas will be produced by digestion,however, so they do have flatulence.