The performance of Al-Shaghal a. lacks repetitive patterns or ostinato. b. features melody followed by taqasim section. c. features uninterrupted improvisation throughout. d. lacks formal organization.

Hi, you've asked a question that seems incomplete. However, I answered from a general musical perspective.

b. features melody followed by taqsim section.

Explanation:

Note, the term Al-Shaghal is sometimes used to refer to a form of musical production that involves several musicians playing the same melody but in different styles, which is usually followed by a tasqsim section.

A tasqsim section often involves a form of musical expression used by Arabian musicians to express their emotions in the course of a musical performance.