Aristotle demarcates in Metaphysics IX.6 three most crucial senses of energeia. There is that which pertains to categorial being, and that which pertains to becoming. Finally, there is energeia involved in the cognitive and affective lives of animals.
Polansky, Ronald, "Aristotle's Demarcation of the Senses of Energeia in Metaphysics IX,6" (1982). The Society for Ancient Greek Philosophy Newsletter. 127.