Enviornmental Science...HELP!

[NicoleD]

Descride the alternative hypotheses for the formation of complex chemicals necessary for life. List potential sources of energy available for synthesis of biological chemicals.

I don't need the answer if it seems like you're doing the question for me...maybe just a hint as to what to look for online? It's not in the book. I'm hopeless when it comes to searching for things on Google. Maybe if you could just lead me to a website with this information? I'd greatly appreciate it.