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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.

This chemical phenomenon was first modeled by Longuet-Higgens, who devised a loop method to represent it. One formulation of it says that if a given type of polyatomic system has two or more branches that intersect at one point, then at least one has no extemum at that point. The dynamic version of this phenomenon is enhanced by decreasing the Debye temperature and happens where the time frame is short. It is comparatively weak in tetrahedral complexes since the ligands are out of alignment with the appropriate orbitals, whereas it is strong in octahedral crystal fields; it's best attested in Copper(II) complexes with 3 electrons in the E-sub-g level. It happens when the lowest energy level of a non-linear molecular system spontaneously attempts to remove degeneracy and form a system of lower symmetry. FTP, name this doubly-eponymous effect, a distortion in chemical geometry to lower energy.
Output:
Science