Can you explain how a rock came to life?A 'dry rock' or a rock sitting in a pool of ... salted* water on the edge of a pool exposed to sunlight** and an 'atmosphere' of some kind***?
(* the 'Salts' to include a variety of elements and compounds)
(**sunlight possibly MUCH stronger than seen now including much higher UV and even IR values)
(*** higher concentrations of gases we now label as 'trace' amounts)
How about any of the above!