You will be given a definition of a task first, then some input of the task.
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.

idea is based on the assumptions that linkage disequilibria must frequently oscillate, and it was originally described it as a corollary to the law of constant extinction. Serial passage experiments support this statement as they show attenuation of the pathogenic species infecting host cell lines. It was formulated by Leigh Van Valen, and it suggests that advantages in one species gained by genetic variations are offset by those gained by another species. It is frequently invoked to explain the evolution of sex. For 10 points, identify this hypothesis which states that species must evolve continually to maintain their fitness, which derives its name from a Lewis Carroll character.
Output:
Social Science