Explanation
Coagulation and flocculation are important processes in water treatment. They are used to remove fine suspended particles from water by causing them to clump together into larger particles, called flocs, which can then be more easily removed by sedimentation or filtration. The purpose of coagulation and flocculation is to remove organic and inorganic fine suspended particulates from water,
so the correct answer is D: Remove organic and inorganic fine suspended particulates.