The spontaneous creation or variation on an established theme within an artistic work is known as improvisation.
A rhythm that emphasizes the off or irregular beats is known as syncopation.
Explanation:
Improvisation is considered an interpretive resource that demonstrates the spontaneity of the artist through the creation or spontaneous variation of a theme established within an artistic work.
In music, syncopation is a rhythmic figure characterized by the execution of sound in a weak time, or weak part of time that extends to the strong time, or next strong part of time, creating a displacement of the rhythmic accentuation, in other words, is the rhythm that emphasizes the off or irregular beats.
A linking verb describes the subject by connecting to the predicate in the sentence. Since it serves as a connector, this type of verb does not refer directly to an action as a regular verb would.