Improvisation is not a defining characteristic of classical music, which typically involves composed and written pieces.

The Baroque period is characterized by its ornate style, use of counterpoint and fugue, and emphasis on melody and harmony.

Joseph Haydn is widely regarded as the father of the symphony, having established the standard four-movement structure.

The Romantic period is known for its emotional intensity, emphasis on individualism, and use of programmatic music.

Johann Sebastian Bach is renowned for his mastery of counterpoint, a technique of combining multiple independent melodic lines.

Bel canto encompasses beautiful singing, ornate vocal technique, and an emphasis on virtuosity.

Jazz Band is not a classical music ensemble, but rather a type of ensemble associated with jazz music.

Recitative is a style of singing that resembles speech, often used in operas and oratorios to convey dialogue and narrative.

Arnold Schoenberg is credited with developing atonality and serialism, two significant techniques in 20th-century classical music.

A concerto is a composition for a solo instrument or instruments accompanied by an orchestra.

Blues is a genre of African-American music, not a major genre of classical music.

A fugue is a contrapuntal composition in which a subject is introduced and then imitated by other voices.

Giuseppe Verdi is renowned for his operas, including 'La Traviata' and 'Rigoletto'.

Sonata-allegro form is a three-movement structure commonly found in classical music, consisting of an exposition, development, and recapitulation.

The Renaissance period is not typically considered a major period in classical music history.