The passage states that what makes art 'art' is the interaction between the work, the viewer, and the context. It emphasizes that the viewer's active process of interpreting meaning is crucial. The correct answer combines these two key elements: context ('置かれた文脈') and the viewer's active interpretation ('鑑賞者による能動的な意味の読み取り'). Wrong answer 1 is incomplete as the author states it's 'not only' the artist's intention. Wrong answer 2 is incorrect because the passage explicitly says the 'physical properties' don't change. Wrong answer 3 is a part of the context but misses the essential role of the viewer's interpretation, which the author highlights as the decisive factor.