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(a) The band of 7 colours (violet, indigo, blue, green, yellow, orange & red) is known as spectrum.
(b) A form of printmaking where the image can only be made once is known as monoprinting.
(c) A prototype is an early sample, model, or release of a product built to test a concept or process.
(d) Choreography is the art of composing steps for a dance.
________
RainbowSalt2222 ☔
Answer: D. Rinaldo
Explanation: His first opera, Rinaldo premiered at the Queen's Threatre in 1711, the same theater in which Andrew Lloyd Webber's Phantom of the Opera first saw the light of day in 1986.