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.

Some Catholics celebrate it following mass under the alternate name of Shigmo, and those belonging to the Banjara tribe mark it by a series of specialized dances. Among the legends associated with it are the murder of a woman who possessed poisonous breast milk, the evil Pootana, and the chasing away of the demon Dhundi. It is typically celebrated on the full moon day, or Poornima, in the month of Phalgun and is characterized by consumption of the drink thandai [thun-DYE] laced with bhang [bung], a form of cannabis. It chiefly commemorates the devoutness of Prahlad, the love of Rati and Kami, and the worship of Krishna. FTP, name this Indian spring festival characterized by large bonfires and people throwing colored powders and water on each other.
Social Science

When it interacts with ryanodine receptors, this element upregulates its own release, and this compound forms the cell plates of coccolithophores. Stimulation of Gq ("g-sub-q") opens a channel that allows for this ion's movement, and proteins that bind this ion have an EF hand motif. Cellular concentrations of this ion are regulated by IP3. Parafollicular cells of the (*) thyroid produce a compound that reduces the concentration of this ion in blood, and its intestinal absorption requires vitamin D. This ion interacts with Troponin to stimulate muscle contraction, and the lumens of sarcoplasmic reticula have high concentrations of this ion. For 10 points, name this divalent cation that is stored in bones.
Science

In one story he accidentally makes love to his sister after his nemesis gives him a potion that turns out to be alcohol. His twin is a dog-like figure who journeys with him into Mictlan to retrieve some bones, with which this god creates humanity. In another story he discovers corn by turning into an ant, and then makes a crack in a mountain so people can use it. After seeing himself in a mirror held by Tezcatlipoca, he immolates himself only to be reborn as the morning star. For 10 points, name this Aztec god known as the Feathered Serpent.
Social Science