Final answer:
The minuet is not found in the first-movement concerto form of the Classical era.
Step-by-step explanation:
The correct answer is d. minuet. The first-movement concerto form of the Classical era typically consists of three main sections: the solo exposition, the development, and the recapitulation. The solo exposition introduces the main themes and features the soloist, while the development section explores and develops these themes further. The recapitulation brings back the main themes and often includes some variations. The minuet, on the other hand, is a dance form commonly found in symphonies and chamber music, but it is not a part of the first-movement concerto form.