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.

Founder-flush models of this phenomenon propose that it may result from repeated bottlenecks. Changes of ploidy in plants can cause this process due to the frequent sterility of the resulting offspring. The(*) sympatric version of this phenomena occurs between populations in the same region, and punctuated equilibria are a sign of the allopatric variety of this process in the fossil record. For 10 points, name this biological process, in which populations become reproductively isolated and diverge, leading to the formation of new species.
Social Science

This man wrote about a creature that "launch'd forth filament, filament, filament" in a poem about a "noiseless patient spider." He wrote "Flood-tide below me! I see you face to face!" in his "Crossing Brooklyn Ferry." He published a "deathbed edition" of his continually revised masterpiece, which includes a poem beginning "I celebrate myself, and sing myself." For 10 points, name this American poet who included "Song of Myself" in his Leaves of Grass.
Literature

In 1998, astronomers discovered Cha H-alpha 1, the first one of these objects to emit X-Rays. They can be difficult to identify because their diameters are often comparable to those of massive planets, although their density is much greater. Most of the known ones have been identified through the detection of lithium, which is not typically found in their larger counterparts. The first verified one, Teide 1, was found in 1995, fitting the classification of having a mass greater than 12 times that of Jupiter, the minimum mass for performing deuterium fusion. FTP, name these non-luminous sub-stellar objects that do not have a large enough mass to fuse hydrogen into helium, often known as "failed stars. "
Science