"Life" is physical matter. This includes behaviour and the illusion of consciousness.

All processes are governed by the chemicals and matter within and outside bodies (both "living" and "inorganic").

 

Even emotion, and the communication and transference of feeling can still be broken down into physical matter and the movement and conversion of energy.

 

If enough information were known on all the variables involved, a chain of events could be predicted in terms of the chemical reactions and physical interactions.