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.

[Q]: Seas of calcite predominate during times of low concentration of this element. The NIMS probe discovered that Ganymede has a sulfate of this element, which is also used to treat eclampsia. Its molten form is used to make metallic titanium in the Kroll process. The active site of rubisco contains a carbamylated lysine attached to an ion of this element. Its cationic form is used to stabilize the product of PCR, and it is also prevalent in certain reagents in a Schlenck equilibrium. It is found in Grignard reagents as well as coordinated to the porphyrin ring of chlorophyll. For 10 points, name this element with atomic number 12 and symbol Mg.
[A]: Science


[Q]: Laplaces rule may be used to compute a version of this quantity for its namesake tensor in order to prove the Alon-Tarsi conjecture for Latin squares of even order; that proof uses Cayleys version of this operator. The Cauchy-Binet rule generalizes it to commutative rings, while Leibnizs formula uses permutations of elements to compute it. Setting to zero the result of this operation on lambda I minus A allows us to calculate As eigenvalues. Cramers rule uses ratios of these to solve systems of linear equations. For ten points, name this quantity that is a d minus c b for a 2 by 2 matrix a b c d.
[A]: Science


[Q]: An alligator and three turban-clan men on horseback attack the titular black African mammal in this artists painting The Hippopotamus Hunt. This artist portrayed Triton blowing a seashell beneath Cybele and Neptune in his painting The Union of Earth and Water, and his more violent paintings include Allegory of Peace and War and the recently discovered Massacre of the Innocents. His wife Hlne Fourment modeled for his paintings The Three Graces and The Garden of Love. He also painted a cycle of canvases about Marie de Medici, as well as a painting of men trying to raise the body of Christ, The Elevation of the Cross. For 10 points, name this Baroque Flemish painter known for his fleshy nudes.
[A]:
Fine Arts