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: These entities can be hierarchically classified based on the Strahler Order. The speed of objects in this kind of system varies by the sixth power of this system's speed by Brahm's law. Einstein wrote a paper about Baer's law, which claims that the hemisphere of the earth in which these bodies are situated affects erosion. When these bodies form underneath glaciers, they create braided ridges known as eskers. Their cross-sectional area multiplied by their average linear velocity gives their discharge. These bodies create ox-bow lakes when they cut off a meander. For 10 points, name these bodies of water exemplified by the Amazon and Mississippi.
A:
Social Science