Which deals with the origin and nature of knowledge?

Metaphysics is concerned with the fundamental nature of reality, including concepts such as being, existence, and the universe. While it may touch on knowledge, its primary focus is not the origin or nature of knowledge itself, but rather the nature of reality that knowledge may describe.

Ethics is the study of moral values and principles, exploring what constitutes right and wrong behavior. While ethical beliefs can be informed by knowledge, ethics does not primarily focus on the nature or origin of knowledge but rather on how individuals should act based on moral considerations.

Logic involves the principles of valid reasoning and argumentation. It provides the framework for evaluating arguments and determining validity but does not specifically concern itself with the origin or nature of knowledge, focusing instead on the structure of arguments.

Aesthetics is the branch of philosophy that deals with the nature of beauty, art, and taste. It explores how we perceive and appreciate artistic expressions rather than addressing questions about knowledge itself, making it unrelated to the origin and nature of knowledge.