system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How did hydrocarbon lakes (oil and gas) form on Titan if Earths formed from broken down biological material?

Titan is one of Saturn's moons. There are more hydrocarbons on Titan than there is on the earth. All of ours (or so I believe) formed from broken down biological material. How did Titan come to be with so much hydrocarbon material present without ever having life?
gpt
Hydrocarbons, especially the simpler ones prevalent on Titan (methane, ethane), can be produced geologically as well.  Titan also has a lot of nitrogen in its atmosphere (most of it is nitrogen), and the interaction between simple hydrocarbons, nitrogen, and sunlight/radiation gives rise to more complex hydrocarbons.