The object of ontology studies
Ontology => one of the most ancient philosophical inquiry fields
According to the term, ontology is the science that discusses the nature that exists, which is the ultimate reality in the form of physical / concrete or spiritual / abstract.
In the ontology approach, people face the problem of how do we explain the nature of all that exists? The first time people are faced with two kinds of reality. The first is the reality in the form of spiritual (mental). And the second is the reality in the form of matter (truth)