system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why only humans need to cook food to eat it?
gpt
Cooking food can be thought of as the first stage of our digestive system. Cooking breaks down the food, and allows our digestive tract to more effectively use the energy and nutrients...

In fact it's thought that the discovery of cooking (and resulting huge leap in energy intake for relatively little output) was the main driver for the development of our brain.. 

We can survive on a mainly raw diet, but cooking food allowed us to take the next evolutionary step!