Final answer:
Metaphysics is the subject of the question, specifically focusing on ontology as a subdivision of metaphysics.
Step-by-step explanation:
The subject of the question pertains to metaphysics, which is a branch of philosophy concerned with understanding the fundamental nature of reality. It explores questions about what exists, what is real, and the nature of being. The specific focus of the question seems to be on ontology, which is a subdivision of metaphysics dedicated to the study of being and what qualifies as being.