Ontology deals with:

Ontology is a fundamental branch of philosophy that deals with the nature of reality. It investigates fundamental questions concerning existence, being, becoming, and the categories of being. Essentially, ontology seeks to understand what exists, what it means for something to exist, and how different entities are related. It explores concepts such as substance, property, relation, causality, and time, aiming to provide a comprehensive account of the structure of reality.

• Knowledge is the domain of epistemology, another core branch of philosophy, which studies the nature, origin, and scope of knowledge, asking questions like "How do we know what we know?"
• Values are the subject of axiology, which is concerned with the nature of value, including ethics (moral values) and aesthetics (artistic values).
• The education system, while influenced by philosophical principles, is not a primary branch of philosophy itself but rather a practical application and field of study informed by various philosophical perspectives.

Therefore, ontology is exclusively concerned with the study of reality and existence.