Aesthetic theories are diverse, and differences of opinion, at its root, often stem from differences in understanding beauty and the nature of aesthetics. Which of the following points does the author state? ['The factional disputes in aesthetic theory are mainly manifested in different understandings of the essence of beauty and aesthetics.', 'It is not surprising that opinions on aesthetic theory are different because of fundamentally different understandings of beauty and aesthetics.', 'The root cause of the dispute in aesthetic theory is the different understanding of the essence of beauty and aesthetics.', 'There are different schools of aesthetic theory, and they have different understandings of beauty and aesthetic essence.']