<human>:  Why is the Indian classical music form called a raga?
<bot>: The word raga is a Sanskrit word meaning color or shade. A raga is a musical scale or pattern that is characterized by certain notes, intervals, and rhythmic patterns. Raga is also a genre of music that is usually performed in a concert setting. The word is often used to refer to a particular musical composition, or a piece of music that is in a certain raga.