What denotes the process of small particles coming together in a solution?

The process of small particles coming together in a solution is best described by the term "aggregation." This term specifically refers to the collection or clumping of particles, which can occur due to various interactions, such as van der Waals forces or chemical interactions. When particles aggregate, they form larger structures or clusters within the solution, which can have implications for the properties and behaviors of that solution.

While "agglutination" often refers to the clumping of specific kinds of particles, such as cells or microorganisms usually mediated by antibodies, it is less general than aggregation. "Dispersion" refers to the process of distributing particles throughout a medium, leading to a more uniform mixture rather than clustering. "Suspension" describes a mixture where solid particles are dispersed in a liquid but not fully dissolved, which can include but is not limited to aggregates.

Therefore, aggregation accurately captures the essence of small particles coming together in a solution, highlighting their tendency to cluster while retaining their individual identities as particles.