Many argue that art cannot be defined. We could go about this in several ways. Art is often considered as the process or product of deliberately arranging elements in a way that appeals to the senses or emotions. It encompasses a diverse range of human activities, creations and ways of expression, including music, literature, film, sculpture and paintings. The meaning of art is explored in a branch of philosophy known as aesthetics. At least, that is what Wikipedia claims.
What is the main idea of the passage?