TASK DEFINITION: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
PROBLEM: An offshoot of this faith known as the Azali was considered the true belief system by E. G. Browne, a 19th and 20th century authority on many of its writings. Two martyrs for this religion were eulogized as the "Twin Shining Lights" in a text written to the son of Aga Najafi, also called the "wolf" by this religion's founder. The dogmas of this religion can be summarized as unity of God, unity of humanity, and unity of religion, and several other key tenets are found in its holy book, the Kitab-i-Aqdas. Shoghi Effendi served as "Guardian" of this faith during the 20th century, and it was founded by a man whose name translates to Glory of God and who took on the mantle and adopted many of the teachings of the Bab. For 10 points, name this Persian religion founded by Baha'ullah.

SOLUTION: Social Science

PROBLEM: The Providers order that Al-lith marry Ben Ata in one of this author's works, which is the second part of a series that ends with Krolgul and Klorathy returning to Shammat. In addition to The Marriages Between Zones Three, Four, and Five and The Sentimental Agents in the Volyen Empire, both part of this author's Canopus in Argos series, this author wrote about the birth of Ben to Harriet and David Lovatt in The Fifth Child and the cat-dog Hugo that accompanies Emily Cartwright in Memoirs of a Survivor. More well known works by this author include one in which Moses kills Mary, the wife of Dick Turner, and one in which stories from Anna Wulf's life are interspersed with excerpts from the novel Free Women. For 10 pointsname this author of The Grass is Singing and The Golden Notebook.

SOLUTION: Fine Arts

PROBLEM: Tremonti et al. used the results from SDSS to derive the relation named for this quantity and stellar metallicity. This quantity is related to the velocity dispersion in a different relation named for it and the Greek letter sigma. Wolf-Rayet stars are defined by their quick changes in this value. The temperature and density variables were used by Jeans to create an upper bound on this quantity for a molecular cloud. The (*) lifetime of a main sequence star is proportional to this quantity raised to the minus 2.5 power, or alternatively this quantity divided by the luminosity. A star possessing a stellar wind is currently lowering its value for this quantity. For 10 points, name this quantity that appears along with the radius and "big G" in Newton's law of gravitation.

SOLUTION:
Science