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: When in solutions of these substances, colloid particles can be pushed together by an osmotic imbalance known as the depletion interaction, and in low concentrations these substances can cause bridging flocculation. When in a theta solvent, these substances follow a random flight model. More generally, their interactions in solution are modeled by Flory-Huggins theory. These substances can be synthesized with the help of Ziegler-Natta catalysts. For 10 points, name these large molecules such as Kevlar and nylon which are made up of many repeating monomers.
A:
Science